Question

cos2 theta ( 1 + tan2 theta)=1​

Answer 1

Answer:

Cos ² theta ( 1+ tan ² theta) = 1

Take L. H. S.

cos² theta ( 1 + tan² theta)

cos ² theta + cos ² theta × tan² theta

cos² theta + cos ² theta × sin ² theta / cos ² theta

cos ² + sin ²

1

hence, proved

bye.