Question

cos square 0 + cos square pi by 6 + cos square pi by 3 + cos square pi by 2​

Answer 1

Step-by-step explanation:

cos²0+cos² pi/6+cos²pi/3+cos²pi/2

=(1)²+cos²30°+cos²60°+cos²90°

=1+(Root3/2)²+(1/2)²+0²

=1+3/4+1/4+0

=1+1

=2