Sin8a/sin2a=4cos2acos4a.plzz help me to prove this identity
Aniket Singh , 9 Years ago
Grade 11
Trigonometry> Sin8a/sin2a=4cos2acos4a.plzz help me to p...
1 AnswersAnkit Jaiswal
Hi Aniket,
I hope this helps
sin8a/sin2a
=2(cos4a)(sin4a)/sin2a [use sin 2a identity]
=2(cos4a)2(cos2a)(sin2a)/sin2a
=4cos2acos4a
henc proved
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