2cos alpha=x+(1)/(x),2cos beta=y+(1)/(y),2cos gamma=z+(1)/(z)" then "xyz+(1)/(xyz)=

If 2cos alpha = x + (1) / (x), 2cos beta = y + (1) / (y) then (x ^ (10)) / (y ^ (12)) - (y ^ (12)) / ( x ^ (10)) =

If 2 cos alpha = x + (1)/(x) and 2 cos beta = y + (1)/(y) , show that x^(m) y^(n) + (1)/(x^(m)y^(n)) = 2 cos (m alpha + n beta)

If cos alpha=(1)/(2)(x+(1)/(x))cos beta=(1)/(2)(y+(1)/(y)) then cos(alpha-beta) is equal to

If cos alpha =1/2(x+1/x),cos beta=1/2(y+1/y) then evaluate cos(alpha-beta)

If x+1/x=2cos alpha,y+1/y=2cos beta, then xy+(1)/(xy)=

Let x+1/x=2cos alpha, y+1/y=2cos beta z+1/z=2cosgamma."Show that"2 "cos"(alpha+beta+gamma)=xyz+1/(xyz)

(x+ (1)/(y)) = (y+ (1)/(z))= (z + (1)/(x)) and (x ne y ne z) find xyz= ?

If : cos^(-1)x+cos^(-1)y+cos^(-1)z=3pi, " then :" x (y+z)+y(z+x)+z(x+y)=

Let x+1/x=2cos alpha, y+1/y=2cos beta z+1/z=2cosgamma."Show that"2 "cos"(p alpha+q beta +r gamma)=x^py^qz^r+1/(x^py^qz^r)

If (x) / (a) cos alpha + (y) / (b) sin alpha = 1, (x) / (a) cos beta + (y) / (b) sin beta = 1 and (cos alpha cos beta) / (a ^ (2)) + (without alpha without beta) / (b ^ (2)) = 0 then