If in a `DeltaA B Csumsin3A=0` then at least one angle of `DeltaABC` is

In a DeltaABC , if(c+a+b) (a+b-c) =ab, then the measure of angle C is

In a DeltaABC , if(c+a+b) (a+b-c) =ab, then the measure of angle C is

If a=2b and A=3B , find the angles A, B, C of DeltaABC :

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

In DeltaABC,"if "cos3A+cos3B+cos3C+cos3pi=0 , then the least value of the sum of two of its angles is

If DeltaABC is right angled at C , then the value of cos(A+B) is

If DeltaABC is right angled at C , then the value of cos(A+B) is

Problem on sine rule Type:-1(i) In a DeltaABC ; If a=2;b=3 and sinA=2/3 ;find /_B (ii) In a DeltaABC; the angle of a triangle are in AP ; It is being given that b:c=sqrt3:sqrt2

Problem on sine rule Type:-1(i) In a DeltaABC ; If a=2;b=3 and sinA=2/3 ;find /_B (ii) In a DeltaABC ; the angle of a triangle are in AP ; It is being given that b:c=sqrt3:sqrt2

The position vectors of vertices of DeltaABC are a,b,c and a*a=b*b=c*c=3. if [a b c]=0, then the position vectors of the orthocentre of DeltaABC is