If `a:b=1:2`, find the angle c and b

If a:b=4:5 , find the angles c and d

If a:b=4:5 , find the angles c and d

If a+b+c=2, ab+bc+ca=-1 and abc=-2 , find the value of a^(3)+b^(3)+c^(3) .

The angle between a+2b" and "a-3b if abs(a)=1, abs(b)=2 and angle between a and b is 60^(@) is

If three points are A(-2,1)B(2,3), and C(-2,-4), then find the angle between AB and BC .

If a+b+c=1 , ab+bc+ca=-2 and abc=1 then find the value of a^4+b^4+c^4

In an acute angled triangle ABC, if tan(A+B-C)=1 and ,sec(B+C-A)=2, find the value of A,B and C.

Consider the matrices : A = {:[(1,-2),(-1,3)] and B = [(a,b),(c,d)] . If AB = {:[(2,9),(5,6)] , find the values of a,b,c and d.

In a triangle ABC, angle A = 60^(@) and b : c = (sqrt3 + 1) : 2 , then find the value of (angle B - angle C)

In a triangle ABC, angle A = 60^(@) and b : c = (sqrt3 + 1) : 2 , then find the value of (angle B - angle C)