Question

if sin theta=1/2 show that 3cos^2 theta =0 ​

Answer 1

sinq=1/2

sin²q=1/4

sin²q+cos²q=1

cos²q=1-sin²q

3cos²q=3-3sin²q

=3-3×1/4

=12-3/4

=9/4

3cos²q are not equel 0