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Mathematics 9 Online
OpenStudy (crashonce):

More easy trig

OpenStudy (crashonce):

\[(2\sin^2A-2\sin^2B)\div (\sin2A-\sin2B) = \tan(A+B)\]

OpenStudy (crashonce):

@ikram002p

OpenStudy (crashonce):

@ganeshie8

OpenStudy (crashonce):

@ParthKohli

Parth (parthkohli):

As you learned earlier,\[\sin^2 A - \sin^2 B = \sin(A + B)\sin(A - B)\]So the numerator is \(2\sin(A+ B)\sin(A - B)\). How about the denominator? Use the identity:\[\sin C -\sin D = 2\cos\left(\frac{C+D}{2}\right)\sin\left(\frac{C-D}{2}\right)\]

OpenStudy (crashonce):

ahhh thanks!

Parth (parthkohli):

Great. Did you get the answer?

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