Question 914644
find all solutions with the domain : zero degrees is less than or equal to theta, which is less than three hundred sixty degrees.
4cos^2A-3=0
{{{4cos^2(A)=3}}}
cos^2(A)=3/4
cos(A)=ą&#8730;3/2
A=30&#730;, 150&#730;, 210&#730;, 330&#730;