Question

x + y = 90 degrees and sin(x) = .432 I need to find cos(y). Please help.

Answer 1

Based on co-function identities:

sin x = cos (90° - x)

Since y = 90° - x, would cos y equal sin x (if x and y equal 90°)?

Answer 2

so, cos(90 - .432)?

Answer 3

sin(x) = .432 ... so cos(y) = .432 if x + y = 90°

Answer 4

seriously? They are the same?

Answer 5

Thank you! That is correct. I appreciate your help :)

Answer 6

:) yes

an example: sin 30° = cos 60°

Answer 7

You're so very welcome!