`cos A =13/14,cos B=1/7,0 < A, B < pi/2 => A-B =`

If A and B are positive acute angles and cos A = 1/7, cos B = 13/14 , then show that A-B=60^0 .

If cos A=1/7 and cos B=13/14 (A, B being positive acute), prove that A -B = 60^@ .

If A and B are positive acute angles and cos A=(1)/(7),cos B=(13)/(14), then show that A-B=60^(@).

If cos A = 1/7 and cos B =""13/14 where A and B both are acute angles, then the value of (A-B) is-

If cos alpha=13/14 and cos beta=1/7 where alpha and beta are acute angles,show that alpha-beta=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 A , Ba n dC are the angels of a triangle, show that |-1+cos B cos C+cos B cos B cos C+cos A-1+cos A cos A-1+cos B-1+cos A-1|=0

If A , Ba n dC are the angels of a triangle, show that |-1+cos B cos C+cos B cos B cos C+cos A-1+cos A cos A-1+cos B-1+cos A-1|=0

If A , Ba n dC are the angels of a triangle, show that |-1+cos B cos C+cos B cos B cos C+cos A-1+cos A cos A-1+cos B-1+cos A-1|=0

If A , Ba n dC are the angels of a triangle, show that |-1+cos B cos C+cos B cos B cos C+cos A-1+cos A cos A-1+cos B-1+cos A-1|=0