Question

sin 71
2
+sin
-1
18.
Let k = tan
then k
27
COS
+cos
18
18
A
TT
18
B
12
2
С
15
TT
4​

Answer 1

Answer:

yep

Step-by-step explanation:

Given cos(A - B) = cos A cos B + sin A sin B, prove each of the following: 1. cos(A + ... 12. sin? A = }(1 - cos 2A). 1 - tan? A. 2 tan A. 13. cos 2A = 7. 14. sin 2A == ... We then use each new formula to derive another formula. 1. ... If tan 0 = k, then, ... 15. 2 sin0 - 1 = 0. 0 V3. 13. tan0 = 1. 14. 4 cos2 0 = 1. 16. tan 30 = 1. 18. cosa - Ž

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