(i) cotx

(ii) secx

Let us take u = cosx and v = sinx

u’ = (cosx)’ = -sinx

v’ = (sinx)’ = cosx

Putting the above obtained values in the formula:-

Ans).

(ii)

Let us take u = 1 and v = cosx

u’ = (1)’ = 0

v’ = (cosx)’ = -sinx

Putting the above obtained values in the formula:-

Ans).