Question

$\binom{1}{5 + 4 \cos(x) } dx$ plz help me

Answer 1

take s = t ok cosx = dt

Answer 2

hint replace cosx by( 1- tan^2 x/2)/(1+tan^2 x/2) then it will convert into sec square x/2 after this u know put thanx/2 =t and solve