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Sir can we use the identity a 2 -b 2 =(a-b)(a+b) in the questions related to trignometry like sin 2 6x -sin 2 4x =sin2xsin10x

Sir can we use the identity


a2-b2 =(a-b)(a+b)


in the questions related to trignometry like


 


sin26x -sin24x =sin2xsin10x


 


 

Grade:11

1 Answers

Badiuddin askIITians.ismu Expert
148 Points
14 years ago

Dear sonam

yes you  can use the identity

a2-b2 =(a-b)(a+b)

in the questions related to trignometry

but here you have done a mistake

sin26x -sin24x =(sin6x -sin4x)(sin6x+sin4x)

 you can not directle add or subtract angel.

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Badiuddin

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