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Question

sin2 24sin2 6=518


Solution

L.H.S. sin2 24sin2 6
= sin (24 + 6) sin (24 - 6)

[   sin (A+B) sin (AB)=sin2 sin2B]=sin 30 sin 18=12.514     [ sin 18 =514]=518

= RHS


Mathematics
RD Sharma
Standard XI

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