Please help me with this question, I need it to pass the class!!

Question

asked Sep 2, 2021 110k views

1 Answer

Leo Cassarani · Answer 1 · 2021-09-08T22:50:41+0000

Answer:

cos(20°)

Explanation:

The "cofunction" is the function having the same value for the complement of the angle that this function has for the angle.

The cofunction of sine is cosine. The complement of 70° is 90° -70° = 20°.

sin(70°) = cos(20°)