Question

If cos theta=4/5 and 0 theta 90 theta 3 cos theta+2cosec theta

Answer 1

Step-by-step explanation:

cosθ1−sinθ+cosθ1+sinθ. cosθ(1+sinθ)+cosθ(1−sinθ)(1−sinθ)(1+sinθ) ... cosθ=12. θ=cos−1(12). θ=π3 , when 0≤θ≤ π .