Question

If cosx= 2/5 what is sine, tangent, secant, cosecant, and cotangent??

Answer 1

cos x = 2/5

Explanation:

`sin x = 1 - cos^2 x = 25/25 - 4/25 = 21/25 -> sin x = +- 0.92.`

`tan x = sin x/cos x = +- 0.92/0.40 = +- 1.84`

cot = +- 1/tan x = 1/1.84 = +- 0.54

sec x = 5/2

csc x = 1/ sin = 1/0.92 = +- 1.09