Q. 15 A4.2( 6 Votes )

# prove that:

cos^{2} π/4 - sin^{2}

Answer :

LHS

__We know that cos ^{2}A – sin^{2}B = cos(A +B) cos(A –B)__

= 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

Conditional Identities31 mins

Trigonometric Functions - 0568 mins

Trigonometric Functions - 0152 mins

Graphs of trigonometric ratios | Trigonometric Identities39 mins

Quiz on Graph of Trigonometric Ratios40 mins

Trigonometric Functions - 0366 mins

Trigonometric Functions - 0658 mins

Trigonometric Series45 mins

Interactive Quiz on trigonometric ratios & identities73 mins

Position of a Word & Sum Of Numbers56 mins

Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Expertsview all courses

Dedicated counsellor for each student

24X7 Doubt Resolution

Daily Report Card

Detailed Performance Evaluation