Eric Nicholas K's answer to Doo's Secondary 3 A Maths Singapore question.
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A rough idea, which uses the following identities:
sin 2A = 2 sin A cos A (double angle formula for sine)
and
sin (180 - A) = sin A (supplementary angle rule for sine)
sin 2A = 2 sin A cos A (double angle formula for sine)
and
sin (180 - A) = sin A (supplementary angle rule for sine)
Date Posted:
3 years ago
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