Question

the relationship sinx = cos(90-x). What is the value of sinx when cos(90-x) is equal to 4/5? a) 4/5 b) 1/4 c) 5/4 d) 5/3

Answer 1

a

Explanation:

given the identity

sin x = cos(90 - x)

given

cos(90 - x) =
`(4)/(5)` , then

sin x =
`(4)/(5)`