Evaluate the following integrals:
Let 
On multiplying and dividing (cosec x + cot x), we can write the integral as
[∵ cosec2θ – cot2θ = 1]
Recall 
We also have 
∴ I = –cot x – cosec x + c
Thus, 
32
Evaluate the following integrals:
Let
On multiplying and dividing (cosec x + cot x), we can write the integral as
[∵ cosec2θ – cot2θ = 1]
Recall
We also have
∴ I = –cot x – cosec x + c
Thus,