Y. If tan- + tan-1 (+5) =, then fin...
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Y. If tan- + tan-1 (+5) =, then find the value of x. 10. Prove that tan-1( 1+x2+V1-*3-* + cos2x2 11 If cnc-1*1 cnc-17- than nrana that _2xy cos y

JEE/Engineering Exams
Maths
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(10) ( operatorname{rant}left(frac{pi+x^{2}+sqrt{1-x^{2}}}{sqrt{1+x^{2}-1+x^{2}}}right)=frac{pi}{4}+frac{1}{2} cos x_{4} ) let ( x^{2}=cos 2 theta )
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