Question

What is the formula of (1-cosx)/sinx ?

Answer 1

`tan (x/2)`

Explanation:

`(1 - cos x) = 2sin^2 (x/2)`
`sin x = 2sin(x/2)(cos (x/2)`
`(1 - cos x)/sin x = (2sin^2 (x/2))/(2sin (x/2)cos (x/2)) = tan (x/2)`