Question

Q.6. Find the value of sin^2 75° - sin^215°​

Answer 1

Answer:

sin 275 ∘ −sin 2 15∘

=sin 2 (90∘−15∘)−sin 215∘

=cos 215∘−sin 215∘

=cos2×15∘

=cos30∘

= 23

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