Question

Example 4. Prove the following identities :
(i) sin x (1 + tan x) + cos x (1 + cot x) = sec x + cosec x
(ii) (1 + cot x - cosec x) (1 + tan x + sec x) = 2.
(1
tan r) + cos x (1 + cot x)​

Answer 1

Step-by-step explanation:

We have 2tan-1(1/3) + tan-1(1/7) = π/4