# Question No. 9 & Question No. 12

Add to Playlist

Report

Lesson#8

Question No. 9

Q9: Prove the following identity:

(2 sinθ sin2θ)/(cosθ+cos3θ)=tan2θ tanθ

Question No. 12

Q12: Prove the following identity:

(tan θ/2+cot θ/2)/(cot θ/2−tan θ/2)=secθ

Trigonometric Identities

Chapter No 10

Exercise No 10.3

Mathematics

part 1

Question No. 9

Q9: Prove the following identity:

(2 sinθ sin2θ)/(cosθ+cos3θ)=tan2θ tanθ

Question No. 12

Q12: Prove the following identity:

(tan θ/2+cot θ/2)/(cot θ/2−tan θ/2)=secθ

Trigonometric Identities

Chapter No 10

Exercise No 10.3

Mathematics

part 1

## Category

📚

Learning