CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
364
You visited us 364 times! Enjoying our articles? Unlock Full Access!
Question

Prove the identity cotθ+cosecθ-1cotθ-cosecθ+1=1+cosθsinθ.


Open in App
Solution

Proving cotθ+cosecθ-1cotθ-cosecθ+1=1+cosθsinθ:

Rewrite the left side using trigonometric identities,

cotθ+cosecθ-1cotθ-cosecθ+1=cotθ+cosecθ-(cosec2θ-cot2θ)cotθ-cosecθ+1

By perfect square formula,

cotθ+cosecθ-1cotθ-cosecθ+1=(cosecθ+cotθ)-cosecθ+cotθ(cosecθ-cotθ(1-cosecθ+cotθ)

Simplify the expression,

cotθ+cosecθ-1cotθ-cosecθ+1=(cosecθ+cotθ)(1-cosecθ+cotθ)(1-cosecθ+cotθ)

cotθ+cosecθ-1cotθ-cosecθ+1=cosecθ+cotθ

cotθ+cosecθ-1cotθ-cosecθ+1=1sinθ+cosθsinθ

cotθ+cosecθ-1cotθ-cosecθ+1=1+cosθsinθ

Hence, it is proved cotθ+cosecθ-1cotθ-cosecθ+1=1+cosθsinθ.


flag
Suggest Corrections
thumbs-up
97
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Parametric Differentiation
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon