Question

If cos x = .67, what is sin x?

Answer 1

Is this with or without a scientific calculator?

Answer 2

use sinx =sqrt(1-cos^2x) =sqrt(1-(.67*.67))

Answer 3

matricked's answer assumes a lot of trigonometry knowledge. How much trigonometry have you done?

Answer 4

\[\cos^2(x) + \sin^2(x) = 1

\\(.67)^2 + sin^2(x) = 1
\\\sin^2(x) = 1 - (.67)^2
\\\sin(x) = \sqrt{1 - (.67)^2} \]