If x and y are acute angles such that `cosx=13/14 ` and cosy`=1/7` , prove that `(x-y)=pi/3`

If x and y are acute angles such that cos x=(13)/(14) and cosy =(1)/(7), prove that (x-y)=(pi)/(3)

If x and y are acute angles such that sin x=(1)/(sqrt(5)) and sin y=(1)/(sqrt(10)) prove that x+y=(pi)/(4)

if x and y are acute angles such that cos x+cos y=(3)/(2) and sin x+sin y=(3)/(4) then sin(x+y)=

If x and y are positive acute angles such that (x+y) and (x-y) satisfy the equation tan^(2)theta-4tan theta+1=0, then x=(pi)/(6)(b)y=(pi)/(4)(c)y=(pi)/(6)(d)y=(pi)/(4)

If sinx=cosy where x and y are acute angle then what is the relation between x and y ?

The acute angle between lines x-3=0 and x+y=19 is . . .

Find the acute angle between the two curves y=x^2 and y=(x-3)^2

Statement:1 if cos theta=1/7 and cos phi = 13/14 where theta and phi both are acute angles, then the value of theta-phi is pi/3 . Statement:2 cos(pi/3)=1/2