Question

FILL IN THE BLANKS.
Prove that sin2 θ/cosθ + cosθ
=1/cosθ

Solution : sin2 θ
cosθ
+ cosθ

=sin2 θ + −−−−/cosθ (fill in the blank space
=cosθ( write the reason)

∴
sin2 θ/cosθ+ cos θ
=1/cosθ

Answer 1

Answer:

sin2@/cos@+cos@=1/cos@

1. sin2

Answer 2

Answer:

=sin2 A+cos2 B/cosB =1/cosB ; (sin2 A+cos2 B= 1)

1/cosB=1/cosB proved.