cos^(-1)((x)/(m))+cos^(-1)[(y)/(h)]-theta dx

cos^(-1)(x//a)+cos^(-1)(y//b)=theta ,then (x^(2))/(a^(2))-(2xy)/(ab)cos theta+(y^(2))/(b^(2))=

If cos^(-1)x+cos^(-1)y=theta show that x^(2)-2xy cos theta+y^(2)=sin^(2)theta

If y=(a^(cos^-1x))/(1+a^(cos^-1x))andz=a^(cos^-1x),then (dy)/(dx) =

If (x)/(a) cos theta + (y)/(b) sin theta = 1 , (x)/(a) sin theta - (y)/(b) cos theta =1 then

2cos theta=x+(1)/(x) and 2cos phi=y+(1)/(y) then (A)x^(n)+(1)/(x^(n))=2cos(n theta)n in Z(B)(x)/(y)+(y)/(x)=2cos(theta-phi)(C)xy+(1)/(Xy)=2cos(theta+phi)(D)x^(m)y^(n)+(1)/(x^(m)y^(n))=2(cos m theta+n phi),m,n in Z

If x = (1-cos^2 theta)/(cos theta), y = (1-cos^(2n)theta)/(cos^n theta) then show that (dy/dx)^2 = n^2((y^2 + 4)/(x^2 +4))

If (cos^(4)theta)/(x)+(sin^(4)theta)/(y)=(1)/(x+y), (theta " is constan t") then (dy)/(dx)=