solve for x, to the nearest degree, in the interval 0degres less than andequal to x greater than and equal to 360degrees.

Question

cos^2x=1

4cos^2x=1

Answer 1

I will do the second one

4cos^2x=1
cos^2x = 1/4
cos x = ± 1/2

so x is in all 4 quadrants
we know cos 60º is 1/2

so x = 60º, 120º, 240º, 300º

the first one is even easier.