You need Trig Identities when Integrating

Integral of sin(2x)/1+2cos^2(x) from 0 to pi/2
First use Trigonometric Substitution and Set up new parameters using trig identity. Product rule for cos squared - 1/2(cos2x+1)

#calculus
#algebra
#productrule
#cosine
#usubstitution
#trigonometricfunctions
#trigonometricfunction
#integral
#integrationbysubstitution
#integrating