solve for sin alpha

Question

1+ctg^2 (alpha)=1/sin^2(alpha) find sind (alpha)?

Answer 1

Your question appears to be nothing more than a quotation of the familiar Pythagorean identity

1 + cot² θ = csc²θ   but I state this using argument theta because the alpha symbol in this font does not look good to me.

 

You ask to find SIND of alpha.  What does THAT mean?

 

Your use of ctg for cotangent is a non-standard convention.