SOLUTION: Find all the values of theta, {{{0<=(theta)<=3pi}}} for which {{{cos^2(theta)=1/2}}}

Algebra ->  Trigonometry-basics -> SOLUTION: Find all the values of theta, {{{0<=(theta)<=3pi}}} for which {{{cos^2(theta)=1/2}}}      Log On


   

Question 1000264: Find all the values of theta, 0%3C=%28theta%29%3C=3pi for which cos%5E2%28theta%29=1%2F2
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
Hi there,
cos^2 (theta) = 1/2
cos(theta) = sqrt(1/2)
cos(theta) = 0.707
theta = pi/4, 7pi/4 and 9pi/4.
Hope this helps :-)