If sin 9° × sin 27° = cos 63° × cos 81° then, what's it identity value?
What is the value of this identity sin1°. sin2°. sin45° .sec88° .sec89° ?
sec( heta).cosec(90° - ( heta)) - tan( heta).cot(90° - ( heta))
(frac{cos(90°+θ).sec(-θ).tan(180° - θ)}{sec(360° + θ).sin(180°+θ).cot(90°-θ)})
What is the numerical value of sin70°.cos20° + sin20°.cos70°?
What is the identical value of sin 240°?
What is the numerical value of tan(-300°)?