Question

Solve for cos^2x=3/4

Answer 1

but that's for cos^2x and it's equal to 3/4..how would you do that ?

Answer 2

cos^2(x) is the same as saying (cosx)^2

Answer 3

how do we account for the 3/4 part?

Answer 4

(cosx)^2=3/4
cosx=sqrt(3/4)
cosx=sqrt(3)/2
x=cos-1(0.866025)
x=0.523599

Correct me if im wrong. Do you know the answer?

Answer 5

no unfortunately I don't have the answer but thank you for helping and I'll try that.

Answer 6

Trust me there is no other way.

Answer 7

Thanks a lot for your help!

Answer 8

i think 30 degree is the ans