Question

Write the value of cot^2 A - 1/sin^2 A

Answer 1

cot^A-1/sin^2A
=(cos^2A/sin^2a)-1/sin^2A
=cos^2A-1/sin^2A ( sin^2A+cos^2A=1)
=-sin^2A/sin^2A
=-1

Answer 2

Cot^2A -1/sin^2A

=Cos^2A/Sin^2A-1/sin^2A

=(Cos^2A-1)/Sin^2A

=-sin^2A/Sin^2A

= -1