Question

Which of the following is equal to cos 35

A) sin 35
B)cos 55
C) sin 55
D) cos 145

Explain why it is equal

Answer 1

B) cos 55

Explanation:

Consider a right angle triangle with 35 angle, the other angle = 180 - 90 - 35 = 55

sin 35 = opposite side of 35 angle / hypothesis

Opposite side of 35 angle is the same as the adjacent side of 55 angle

sin 35 = adjacent side of 65 angle / hypothesis = cos 55

The answer is B.

Answer 2

Heya!!!!

Answer to your question:

C) sin 55

cos 35= sin (90-35)= sin 55


Hope it helps *_*