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If $ A+B+C=\large\pi,\;\normalsize show\;that\;\begin{vmatrix} \sin (A+B+C) & \sin B & \cos C \\ -\sin B & 0 & \tan A \\ \cos (A+B) & -\tan A & 0 \end{vmatrix}=0$
cbse
class12
additionalproblem
kvquestionbank2012
ch3
q39
p9
math
sec-b
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Jan 24, 2013
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meena.p
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