Sir can we use the identitya2-b2 =(a-b)(a+b)in the questions related to trignometry likesin26x -sin24x =sin2xsin10x

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