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Showing posts with label system of equations. Show all posts
Showing posts with label system of equations. Show all posts

Thursday, February 3, 2011

Find angle C

From AMC12 1999:

In triangle $ABC$,
$3 \sin A + 4 \cos B = 6$
$4 \sin B + 3 \cos A = 1$

Find $\angle C$