$$(1+tan θ+secθ)(1+cotθ-cosecθ)\over (sec θ+tan θ)(1-sin θ) $$ is equal to :

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

The value of sin 73⁰ + cos 137⁰ is:

Select the INCORRECT formula from the following options.

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

if 2sinθ + 2sin²θ = 2, then the value of 2 cos⁴θ + 2cos²θ is:

if $${secA={5\over 4}}$$, then the value of $${{tanA}\over 1+tan^2A}-{sinA\over secA}$$ is

Find the value of sin (1920°)