Question

1- Cos theeta/ 1+ cos theeta = ( cosec theeta- cot theeta ) ²​

Answer 1

Step-by-step explanation:

1 - cos theeta/1 + cos theeta

multiplying and dividing by ( 1 - cos theeta)

= (1- cos theeta)/( 1 + cos theeta) × ( 1- cos theeta)/( 1- cos theeta)

=( 1 - cos theeta) square/1 square+ cos square theeta

=( 1 - cos theeta) square /cos square theeta

=1 - cos theeta/sin theeta

= 1/sin theeta - cos theeta / sin theeta

=cosec theeta+cot theeta