if (1+sinα) (1-sinβ) (1+sinγ)= (1-sinα) (1-sinβ) (1-sinγ)=?

The elimination of θ from x cosθ-y sinθ=2 and x sinθ + ycosθ = 4 will give

If $${secθ+tanθ\over secθ-tanθ}={5\over 3}$$ then sinθ is equal to ;

If x = a secθ cos∅, y = b secθ sin∅, z=c tanθ, then the value of $$ {x^2\over a^2}+{y^2\over b^2}-{z^2\over c^2} $$

If is a positive acute angle and 5 cosθ + 12 sinθ = 13, then find the value of cosθ?

If p = cosec θ – cot θ and q = (cosec θ + cot θ)^-1 then which one of the following is correct?

What is the value of the expression?

(tan0° tan1° tan2° tan3° tan4° …… tan89°)

Find the value of sin (1920°)