2 sin100 cos 100

any suggestion? thanks in advance

- Feb 4th 2010, 10:16 PMalessandromangionewrite the expression as the sine, cosine , or tangent of an angle
2 sin100 cos 100

any suggestion? thanks in advance - Feb 4th 2010, 11:07 PMSudharaka
Dear alessandromangione,

$\displaystyle 2sin\theta\cos\theta=sin2\theta$

Therefore,

$\displaystyle 2sin100^{o}cos100^{o}=sin(2\times100^{o})=sin200\a pprox-0.3420$

Hope this will help you.

By the way what a big name you have! Can you tell us the meaning of it??