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\begin{array}{l}{\frac{4 \sin ^{2} 60+\sec ^{2} 60+4 \sin ^{2} 45+3 \cos ^{2} 90}{\sec 60+\cos \operatorname{ec} 30^{\circ}-\sin 90}} \\ {\text { (a) } 0}\end{array} |
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Answer» sin60=√3/2 sec60=2 sin45=1/√2 cos90=0cosec30=2 sin90=1put in equation4*3/4+4+4/2+3*0/2+2-13+4+2/4-19/3=3 |
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