Question

if cos(x+iy)=r(cos a+i sin a) prove that y=1/2 log [(sin (x-a))/(sin (x+a))]​

Answer 1

Answer:

If cos^(- 1)(y,b)=log(x,n)^n Find the value of x^2(d^2y),(dx^2)+x(dy) ... Find the angle of intersection of the following curves : `y^2=xa ... If `y= x sin(logx) + xlogx`, prove that ` ... If `y=(1/2)^(n-1) cos.