If `a Delta b=a-b=5` find `(-7)Delta3`

If in Delta ABC,a=3,b=5,c=7 find the greatest angle.

If Delta is an operation such that for integers a and b we have aDeltab=axxa-2xxaxxb+bxxb then find (i) 4 Delta(-3) (ii) (-7) Delta(-1)

In a Delta ABC,a=5,b=3 and c=7, then the value of 3cos C+7cos B is equal to

If in a Delta ABC, two sides are a=3,b=5 and cos(A-B)=(7)/(25), find (tan)(c)/(2)

In Delta ABC , a= 6 ,b=3 and cos (A-B) = 4/5 .Then are of triangle is

If in a triangle ABC, a=3, b=5 and c=7, show that the triangle is obtuse angled.

In triangle ABC , if a=3, b=4, and c=5, then find the value of cosA.

In triangle ABC , if a=3, b=4, and c=5, then find the value of cosA.

If Z=(A^(4)B^(1/3))/(CD^(3/2)) ,than relative error in Z (Delta Z)/(Z) is equal to (a) ((Delta A)/(A))^(4)+((Delta B)/(B))^(1/3)-((Delta C)/(C))-((Delta D)/(D))^(3/2) (b) 4((Delta A)/(A))+((1)/(3))((Delta B)/(B))+((Delta C)/(C))+((3)/(2))((Delta D)/(D)) (c) 4((Delta A)/(A))+(1)/(3)((Delta B)/(B))-((Delta C)/(C))-((3)/(2))((Delta D)/(D)) (d) ((Delta A)/(A))^(4)+(1)/(3)((Delta B)/(B))+((Delta C)/(C))+(3)/(2)((Delta D)/(D))