Trig simplification?

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Trig simplification?

What is the sine of twice the angle whose cosine is x?

sin(2arccos(x))=?

2007-02-10 01:30:27 · 1 answers · asked by Mehoo 3 in Science & Mathematics ➔ Medicine

My bad, I didn't mean to put this in medicine.

2007-02-10 01:30:59 · update #1

1 answers

Use the angle addition formula:
http://en.wikipedia.org/wiki/Double-angle_formulas#sin.28x_.2B_y.29_.3D_sin.28x.29_cos.28y.29_.2B_cos.28x.29_sin.28y.29

2007-02-10 01:52:31 · answer #1 · answered by arbiter007 6 · 0⤊ 0⤋