निम्नलिखित समीकरण को हल कीजिए :
`(sin alpha)/(1 - cos alpha) + (sin alpha )/(1 + cos alpha ) = 4 `

Explanation

`(sin alpha)/(1 - cos alpha) + (sin alpha )/(1 + cos alpha ) = 4 `
`rArr (sin aloha (1 + cos alpha) + sin alpha (1 - cos alpha))/((1 - cos alpha )(1 + cos alpha)) = 4 `
`rArr (sin alpha + sin alpha cos alpha +sin alpha - sin alpha cos alpha )/(1 - cos^(2) alpha ) = 4 `
`rArr (2sin alpha)/(sin^(2) alpha )= 4 rArr (2)/(sin alpha) = 4 `
`rArr sin alpha = (1)/(2) = sin 30^(@)`
`rArr alpha = 30^(@)` .