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[" Two vectors "vec P&vec Q" are inclined to each other at "],[60^(@)." The magnitude of "vec P" and "vec Q" are "10" and "15],[" units resp.What is the angle "(alpha)" made by their "],[" resultant "vec R" with "vec P?],[" (1) "quad alpha=tan^(-1)(0.5)],[" (2) "quad alpha=tan^(-1)(0.6134)],[" (3) "quad prop=tan^(-1)(0.7422)],[" 4) "quad prop=tan^(-1)(0.92)]

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