Question

If sin x = 0.6, what is the value of cos x?

Answer 1

`sin^2(x)+cos^2(x) = 1`

If `sin(x) = 0.6`
then
`(0.6)^2+cos^2(x) = 1`

`cos^2(x) = 1 - 0.36 = 0.64`

`cos(x) = +- 0.8`