If 0 ≤ x ≤ 90, state the numerical value of x for which sin x^o = cos x^o.

Find the value of (cos0° + sin45° + sin30°) (sin90° - cos45° + cos60°).

9 tan²θ - 9 Sec²θ =

If 4 sin ² θ - 1 = 0 and θ is less than 90^o, then the value of θ is

Find the value of  .

What is the inverse of sin 60° ?

If x cosθ - y sinθ = a, x sinθ + ycosθ = b, then  x² + y² =

If sec 5A = cosec (A - 20), where 5A is an acute angle, then the value of A is

cosec 74 + tan 81 equal to

sin 45⁰ - cos 45⁰ =