Section outline

  • Section 6.2: Special Right Triangles
    ::第6.2节:特别右三角

    1. The other sides are 3 and  3 2 .
      ::另一方是3和32。
    2. The other sides are 7.2 and 7.2 2 .
      ::其他方面分别为7.2和7.22。
    3. The other sides are each 8 2 .
      ::对方是82个
    4. The other sides are 5 2  and 10.
      ::其他方面为52和10。
    5. The other sides are  3 6  and  6 2 .
      ::另一方是36和62
    6. The other sides are  4 3 3  and  8 3 3 .
      ::其他方面为433和833。
    7. The other sides are 7.5 and 7.5 3 .
      ::其他方面为7.5和7.53。
    8. The other sides are 6 3  and 18.
      ::另一方是63岁和18岁。
    9. The 67.38 ° angle
      ::67.38度角
    10. The side labeled 13
      ::侧面贴有13个标签
    11. The 22.62 ° angle
      ::22.62度角
    12. 3 2 + 4 2 = 25 = 5 2
    13. 5 2 + 12 2 = 169 = 13 2  
    14. 7 2 + 24 2 = 625 = 25 2    
    15. 8 2 + 15 2 = 289 = 17 2
    16. 9 2 + 40 2 = 1 , 681 = 41 2
    17.   6 2 + 8 2 = 100 = 10 2
    18. Answers vary. One option would be 22, 120, 122.
      ::答案各有不同,一种选择是22、120、122。

     

    Section 6.3: Right Triangle Trigonometry
    ::第6.3节:右三角三角三角三角测量

    1.   a = 8.06 ,   b = 4.0 ,   C = 60.3 °
      ::a=8.86,b=4.0,C=60.3度
    2.   B = 53 ° ,   c = 10.8 ,   b = 14.4
      ::B=53°,c=10.8,b=14.4
    3.   A = 75 ° ,   c = 8.3 ,   a = 30.9
      ::A=75°,c=8.3,a=30.9
    4.   a = 6.0 ,   b = 9.2 ,   B = 56.9 °   
      ::a=6.0, b=9.2, B=56.9°
    5.   C = 78 ° ,   b = 4.0 ,   c = 18.6  
      ::C=78°,b=4.0,c=18.6
    6.   a = 13.7 ,   b = 17.0 ,   C = 36.0
      ::a=13.7,b=17.0,C=36.0
    7.   C = 80 ° ,   a = 11.5 ,   c = 11.3
      ::C=80°, a=11.5, c=11.3
    8.   C = 86 ° ,   b = 4.3 ,   c = 4.29
      ::C=86°, b=4.3, c=4.29
    9.   B = 0.57  radian,  a = 17.8 ,   b = 9.6
      ::B=0.57弧度, a=17.8, b=9.6
    10.   b = 15.0 ,   c = 9 ,   C = 0.6  radian
      ::b=15.0,c=9,C=0.6弧度
    11.   a = 10.7 ,   A = 0.87  radian,  b = 9.0
      ::a=10.7,A=0.87弧度,b=9.0
    12.   C = π 2  radian,  a = 5 , c = 5 2
      ::C2弧度, a=5,c=52
    13.   B = π 6 ,   C = π 3 ,   c = 13 3
      ::B6、C3、c=133
    14.   a = 10.2 ,   A = 0.6  radian,  c = 16.0
      ::a=10.2, A=0.6弧度, c=16.0
    15.   A = π 4  radian,  B = π 4  radian,  b = 10
      ::A 4 弧度, B 4 弧度, b= 10

     

    Section 6.4: Inverse Trigonometric Functions
    ::第6.4节:逆三角函数

    1. Approximately 57.03°
      ::约57.03度
    2. Approximately 79.05°
      ::约79.05度
    3. Approximately 12.02°
      ::约12.02度左右
    4. Approximately 39.99°
      ::约39.99度
    5. Approximately 61.01°
      ::约约61.01度
    6. Approximately 23.00°
      ::约23.00摄氏度
    7. x 45  and  y 45  
      ::{\fn黑体\fs22\bord1\shad0\3aHBE\4aH00\fscx67\fscy66\2cHFFFFFF\3cH808080}你... {\fn黑体\fs22\bord1\shad0\3aHBE\4aH00\fscx67\fscy66\2cHFFFFFF\3cH808080}你...
    8. x 71  and  y 19  
      ::{\fn黑体\fs22\bord1\shad0\3aHBE\4aH00\fscx67\fscy66\2cHFFFFFF\3cH808080}... {\fn黑体\fs22\bord1\shad0\3aHBE\4aH00\fscx67\fscy66\2cHFFFFFF\3cH808080}你...
    9. x 27  and  y 63  
      ::{\fn黑体\fs22\bord1\shad0\3aHBE\4aH00\fscx67\fscy66\2cHFFFFFF\3cH808080}... {\fn黑体\fs22\bord1\shad0\3aHBE\4aH00\fscx67\fscy66\2cHFFFFFF\3cH808080}...
    10. x 45  and  y 45  
      ::{\fn黑体\fs22\bord1\shad0\3aHBE\4aH00\fscx67\fscy66\2cHFFFFFF\3cH808080}你... {\fn黑体\fs22\bord1\shad0\3aHBE\4aH00\fscx67\fscy66\2cHFFFFFF\3cH808080}你...
    11. x 50  and  y 40  
      ::{\fn黑体\fs22\bord1\shad0\3aHBE\4aH00\fscx67\fscy66\2cHFFFFFF\3cH808080}你... {\fn黑体\fs22\bord1\shad0\3aHBE\4aH00\fscx67\fscy66\2cHFFFFFF\3cH808080}你...
    12. b 39.7 ,   A 39 ,  and B 51  
      ::39.7,A39和B51
    13. c 10.8 , A 34 ,  and B 56  
      ::10.8,A34和B56
    14. a 10.7 ,   A 50 ,   and   B 40  
      ::===================================================================================================================================================== =======================================================================================================================================================================================================================================================================================================================================================================
    15. Approximately 34.99°
      ::约34.99度
    16. Approximately 21.8°
      ::约21.8摄氏度
    17. Approximately 88.26 °
      ::约88.26°

     

    Section 6.5: The Law of Cosines
    ::第6.5节:《科士法》

    1. 36.7°
    2. 48.3°
    3. 95°
    4. 118.7°
    5. 27.1°
    6. 34.2°
    7. 16.85
    8. 80.47°
    9. 38.53°
    10. 4.4 miles
      ::4.4英里
    11. Approximately 47.1 feet
      ::约47.1英尺
    12. 560 feet
      ::560英尺
    13. Yes
      ::是 是
    14. No
      ::否 无
    15. Yes
      ::是 是

     

    Section 6.6: The Law of Sines 
    ::第6.6节:《锡纳法》

    1. 35.2 °  or 144.8 °
      ::35.2°或144.8°
    2. 22.5 °
    3. 22.6 °  or 157.4 °
      ::22.6度或 157.4度
    4. 58.9 °
    5. 65 °  or 115 °
      ::65度或115度
    6. 71.8 °  or 108.2 °
      ::71.8度或108.2度
    7. 63.9 °
    8. No solution
      ::无解决方案
    9. No solution
      ::无解决方案
    10. 51.5 °
    11. b > 6.3  
      ::b>6.3
    12. b < 13.8  
      ::b<13.8
    13. b = 20.74  or  b 21  
      ::b=20.74或b21
    14. Bill is 2.52 miles from school, and Connie is 3.1 miles from school.
      ::法案是2.52英里离学校,康妮是3.1英里离学校。
    15. About 0.62 miles
      ::约0.62英里

    Section 6.7: Area of a Triangle
    ::第6.7节:三角区域

    1. 91.6 square units
      ::91.6平方单位
    2. 13.6 square units
      ::13.6平方单位
    3. 403.8 square units
      ::403.8平方单位
    4. 10.4 square units
      ::10.4 平方单位
    5. 7.2 square units
      ::7.2平方单位
    6. 11.2 square units
      ::11.2平方单位
    7. 13.6 square units
      ::13.6平方单位
    8. 4.3 square units
      ::4.3平方单位
    9. 17.3 square units
      ::17.3平方单位
    10. 18.8 square units
      ::18.8平方单位
    11. 72.3 square units
      ::72.3平方单位
    12. 48.6 °
    13. 41.1 °
    14. 45.3 °
    15. 22.9°

     

    Section 6.8: Applications of Basic Triangle Trigonometry
    ::第6.8节:基本三角三角三角测量应用

    1.  
    2. Find the angle in the triangle (complementary angle), and then use tangent.
      ::在三角形中查找角度( 补充角度) , 然后使用正切值 。
    3. 259.8 feet
      ::259.8英尺

    4. Tangent
      ::切同切同
    5. 57.05 feet
      ::57.05英尺

    6. This is a right triangle, so you can use the Pythagorean Theorem.
      ::这是一个右三角形, 你可以使用毕达哥伦理论。
    7. 6.32 miles
      ::6.32英里

    8. Two tangent equations to solve for the distance from B to the building, then substitute to solve for the height.
      ::从B到大楼的距离要解决的两个相切方程式,然后取代高度的方程式。
    9. 9.8 feet
      ::9.8英尺
    10. 5.32 inches
      ::5.32英寸
    11. 10.48 inches
      ::10.48英寸
    12. 10.35 inches
      ::10.35英寸 10.35英寸