Find the value of sin² 10 + sin² 20 + sin² 30 + ....... + sin² 80.

If θθθθ then the value of Cotθ is

If 2sin²θ–5sinθcosθ+7cos²θ=1then possible values of tan θ are

If 3 tan θ - 4 = 0 and 180° < θ < 270° then cosec θ = _______

If tanθ=1/5 then the value of Cosec²θ=?

If cos3A = X, then value of X?

(secA – 1)/(secA + 1) is equal to?

If x tan45° cos30° = sin30° cos45°, then x is equal to -