The value of Sin^14 (21°) + 7Sin^12(21°) Cos^2(21°) + 21Sin^10(21°)Cos^4(21°) + 35Sin^8(21°)Cos^6(21°) + 35Sin^6(21°)Cos^8(21°)
+ 21 Sin^4(21°)Cos^10( 21°) + 7Sin^2(21°)Cos^12(21°)+ Cos^14 (21°) is......
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