Question

How to solve this?With solutions

Answer 1

C

Explanation:

Step 1: Determine the value of x by using
`x=tan^(-1)((√(3) )/(√(2)) )`

`x=tan^(-1)((√(3))/(√(2) ))=50.7685 degrees`

Step 2: Substitute x=50.7685 degrees into the original equation

`2cos^(4)(x)-sin(x)=2cos^(4) (50.7685)-sin(50.7685)=0.320-0.7746=-0.4546`