Q. 3 B3.7( 10 Votes )

# Prove the following identities.

Consider LHS,

LHS = +

We know that = cotθ and = tanθ.

+ = +

= +

= +

= [ - ]

= []

We know that a3 – b3 = (a – b) (a2 + ab + b2).

+ = []

We know that sin2θ + cos2θ = 1.

+ =

= +

We know that = cosecθ and = secθ.

+ = 1 + secθcosecθ = RHS

Hence proved.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Champ Quiz | Trigger on Trigonometry47 mins
Basics of TrigonometryFREE Class
NCERT | Imp. Qs. Discussion - Trigonometry44 mins
NCERT | Trigonometric Identities52 mins
NCERT | Discussion on Imp. Qs. of Trignometry45 mins
Champ Quiz | Trigonometry Important Questions33 mins
Solving NCERT Questions on Trigonometric Identities56 mins
NCERT I Trigonometric Ratios50 mins
Smart Revision | Revise Trigo Like an Expert51 mins
NCERT | Imp. Qs. on Trigonometry42 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses