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In ` A B C ,P` is an interior point such that `/_P A B=10^0/_P B A=20^0,/_P C A=30^0,/_P A C=40^0` then ` A B C` is (a) isosoceles (b) right angled (c) obtuse angled

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CENGAGE ENGLISH-TRIGONOMETRIC FUNCTIONS-All Questions
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