If $$\frac{\cos \theta}{1-\sin \theta }+ \frac {\cos θ}{1+\sin⁡ θ }=4$$​, find the value of ‘θ’, is acute.

Simplify: cosecθ(1 – cosθ)(cosecθ + cotθ)

If cot ⁡A + cos ⁡A = p, cot ⁡A - cos ⁡A = q, then what is the value of p²- q²?​​

What is the value of sin 20° cos 10° + cos 20° sin 10°?

If sin x = $$\frac 35$$​ and x ∈ (0, $$\frac{\pi}2$$​), then find $$\frac{1+\tan x}{1-\tan x}$$​​