# write the expression as the sine, cosine , or tangent of an angle

• February 4th 2010, 11:16 PM
alessandromangione
write the expression as the sine, cosine , or tangent of an angle
2 sin100 cos 100
• February 5th 2010, 12:07 AM
Sudharaka
Quote:

Originally Posted by alessandromangione
2 sin100 cos 100

Dear alessandromangione,

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

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