Question

`cos 45°` is equal to `sin` of what?

Answer 1

`sin 45^@`

Explanation:

Given: `cos 45^@`

From the trigonometry cofunction identities: `cos theta = sin (90^@ - theta)`

Let `theta = 45^@: " " cos 45^@ = sin (90^@ - 45^@) = sin 45^@`