Use cofunctions of complementary angles to complete the relationship. cos(56°) = sin ?°

Answer 1

So complementary angles are angles whose sum equals 90 degrees.

The cofunctions mean that the complementary sum of the angles of a sin and cosine function will equal the same.

For example: Sin (45) and Cos (45) both equal sqrt(2) / 2 and their angles total to 90 degrees.

So now you have Cos (56) = Sin (?)

Now we just 90 - 56 = 34

Therefore, Cos (56) = Sin (34)

Hope this explanation helped for future problems too

Answer 2

cos(56) = sin(34)