sin(2n+1)A.sinA = sin^2(n+1)A-sin^2(nA)
ashish yadav , 12 Years ago
Grade 11
Trigonometry> prove-this-also...
1 Answers
Praneetha reddy
Last Activity: 12 Years ago
By using this formula,
sin2A - sin2B = sin ( A + B ) sin ( A - B )
RHS = sin2(nA +A) - sin2(nA) = sin( nA + A +nA ) sin ( nA + A - nA) = sin (2n + 1) A sin A = LHS
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