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Trigonometry of a right triangle

Exercises

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1- Using triangle ABC, find the value of the trigonometric relations:
sin A et cos B

sin A = 0.3846 and
cos B = 0.3846
sin A = 0.4166 and
cos B = 0.9230
sin A = 0.9230 and
cos B = 0.9230
     


2- Using triangle ABC, find the value of the trigonometric relations:
sin A, cos B, tan B, sec A

sin A = 0.3846
cos B = 0.9230
tan B = 0.4167
sec A = 0.9230
sin A = 0.3846
cos B = 0.3846
tan B = 2.4
sec A = 1.0833
sin A = 0.3846
cos B = 0.9230
tan B = 2.4
sec A = 1.0833


3- Calculate the length of the sides a and b in the right triangle:

a = 7.22
b = 9.58
a = -7.72
b = 9.19
a = 19.94
b = 15.03
     


4- Calculate the value of angle B in right triangle ABC.
59.97° 53.97° I need help.
     


5- Calculate the length of line segment DC in right triangle ABC
-5.14 6.88 I need help.
     


6- With the aid of a calculator, evaluate sin 30° - cotan 60°
-0.0774 -1.232 -4.112


7- Evaluate the expression
-0.011 1.5322 Neither of the answers is correct.
     


8- Evaluate
0.8654 0 Impossible to evaluate
     


9- Solve the following equation; = tan 60°
1.4142 2.121 Neither of these answers is correct.
     


10- The shadow cast by a building is 100m long, while the sun is at an angle of 60° to the ground. Calculate the height of the building.
57.73m 173.2m 32m I need help?
  


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