Question

2 sin 30 + tan square 45 degree - cos square 150 degree

Answer 1

=2 sin30 + tan^2 45 + cos^150

= 2 (1/2) + (1)^2 + cos(90+60)

=1 + 1 + sin60 (because cos (90+theta)= sin theta)

= 2 + root 3/2

$\frac{ \sqrt{3} + 4 }{2}$