Question

(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 )

# 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

Solution