Question

If sinθ = x and tanθ = y, find cosθ

Answer 1

cosΘ =
`(x)/(y)`

Explanation:

using the identity

tanΘ =
`(sin0)/(cos0)` , that is

y =
`(x)/(cos0)` ( multiply both sides by cosΘ )

cosΘ × y = x ( divide both sides by y )

cosΘ =
`(x)/(y)`