Home
Class 11
MATHS
If A+B-C=3pi,\ t h e n\ sin A+ sin B-...

If `A+B-C=3pi,\ t h e n\ sin A+ sin B-sin C` is equal to- a.`4sin(A/2)sin(B/2)cos(C/2)` b. `-4sin(A/2)sin(B/2)cos(C/2)` c.`\ 4cos(A/2)cos(B/2)cos(C/2)` d. `-4cos(A/2)cos(B/2)cos(C/2)`

Promotional Banner

Similar Questions

Explore conceptually related problems

If A +B + C = pi then secA (cos B cos C - sin B sin C) = .........

Prove that, sin^(2)A+sin^(2)B+cos^(2)(A+B)+2sinAsinBcos(A+B)=1

If A + B + C = 180^@ , then prove that sin 2 A+ sin 2B + sin 2C = 4 sin A sin B sin C

Prove that, sinA+sinB+sinC-sin(A+B+C)= 4sin((A+B)/(2))sin((B+C)/(2))sin((C+A)/(2))

If A,B,C are the angles of a triangle then prove that cosA+cosB-cosC=-1+4cos(A/2)cos(B/2)sin(C/2)

If A, B and C are interior angles of a triangle ABC, then show that sin((B+C)/2)=cos(A/2)

(sin(A-C)+2sinA+sin(A+C))/(sin(B-C)+2sinB+sin(B+C)) is equal to

In DeltaABC,if cos A+ sin A -(2)/(cos B + sin B) =0, then (a+b)/c is equal to

For any triangle ABC, prove that : sin""(B-C)/(2)=(b-c)/(a)cos((A)/(2))