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यदि veca=hati+2hatj+2hatk, |vecb|=5 और ...

यदि `veca=hati+2hatj+2hatk, |vecb|=5` और `veca` तथा`vecb` के बीच कोण `pi/6` है , तब दोनों भुजाओं के रूप में इन दो सदिशों के द्वारा बनने वाले त्रिभुज का क्षेत्रफल है -

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