Question

Please help me with this problem

Answer 1

third option

Explanation:

we will use the Greek letter
`\alpha` for the calculations:

cot
`\alpha` =
`(cos\alpha )/(sin\alpha )`

so we have:

`(cot\alpha)/(cos\alpha) = ( (cos\alpha)/(sin\alpha))/(cos\alpha)` =

`(cos\alpha)/(sin\alpha * cos\alpha) = (1)/(sin\alpha) = Csc\alpha`