Question

find the value of sin ^2 60 degree + tan ^2 30 degree - cos ^2 45 degree​

Answer 1

sec^2 30 degree+cot^2 45 degree-cosec^2 60 degree cos^2 30 degree

=2^2+1^2-(2/square root of 3)^2(square root of 3/2)

=4+1-(4/3)(3/4)

=5-1

=4

so the answer=4