Question

show that 1-cos^2 A /1- cos ^2A = sin 2^ A/ 1- cos A​

Answer 1

Answer:

Identity : sin

2

A+cos

2

A=1

LHS =(1−cos

2

A)cosec

2

A

=sin

2

A×

sin

2

A

1

=1

=RHS

Hence proved