Evaluate the following integrals:
Let 
We know cos2θ = 2cos2θ – 1
Hence, in the denominator, we can write 1 + cos2x = 2cos2x
Therefore, we can write the integral as
Recall 
Thus, 
33
Evaluate the following integrals:
Let
We know cos2θ = 2cos2θ – 1
Hence, in the denominator, we can write 1 + cos2x = 2cos2x
Therefore, we can write the integral as
Recall
Thus,