sin18º. cos 36° = 1/4
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Answered by
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Sin18° = 0.309
Cos36° = 0.809
Sin18° × Cos36°
0.309 × 0.809
0.249
0.25 ( Rounding Off )
25/100
1/4
Hence Proved
mysticd:
we have to use sinAcosA formula
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