Question

Evaluate sin²30°+sin²60°+sec²30°-cot²30°-sec²45°

Answer 1

Putting their values:-

(1/2)^2+(√3/2)^2+(2/√3)^2-(√3)^2-(√2)^2

=1/4+3/4+4/3-3-2=4/3-4= -8/3