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#1 2006-12-06 04:13:50

Neha
Member
Registered: 2006-10-11
Posts: 173

Identity

Develop the identity for sin 2A using the identity sin(A + B)

http://www.mathwords.com/t/trig_identities.htm

use this formula
sin 2x = 2sinx cos x

or use this formula
sin(x+y) = sin x cos y + cos x + sin y


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#2 2006-12-06 04:59:36

Neha
Member
Registered: 2006-10-11
Posts: 173

Re: Identity

neva mind guys i got it

sin(A + B) = sinA cosB + cos A + B
sin(A + A) = sinA cosA + cosA sinA
sin 2A = 2 sinA cosA


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