Question

Plz plz solve this problem

Answer 1

(cosec@ - cot@)²,

(1/sin@ - cos@/sin@)²,


[(1-cos@)/sin@]²,


(1-cos@)²/sin²@,


(1-cos@)²/(1-cos²@),


[(1-cos@)(1-cos@)]/[(1-cos@)(1+cos@)],


then


(1-cos@)/(1+cos@)