Home
Class 11
MATHS
In DeltaABC, prove that: cos2A+cos2B-c...

In `DeltaABC`, prove that:
`cos2A+cos2B-cos2C=1-4sinAsinBcosC`

Promotional Banner

Similar Questions

Explore conceptually related problems

If A+B+C=pi , prove that : cos2A+cos2B-cos2C=1-4sinA sinB cosC

cos2B + cos2A-cos2C = 1-4sin A sin B cos C

If A + B + C =pi , prove that : cos 2A + cos 2B -cos 2C= 1-4sin A sin B cos C .

If A, B, C are angles of a triangle , prove that cos 2A+cos 2B -cos 2C=1-4 sin A sin B cos C

If A+B+C=180^(@) then prove that the following: cos2A+cos2B-cos2C =1-4sinAsinBcosC

In a /_ABC prove that cos2A+cos2B+cos2C=-1-4cos A cos B cos C

If A+B+C=pi , prove that : cos2A+cos2B+cos2C=-1-4cosA cosB cosC

If A+B+C = pi , prove that : cos2A +cos2B +cos2C =-1-4cosAcosBcosC .

If A+B+C = pi , prove that : cos2A-cos2B -cos2C = -1+4cosAsinBsinC

If A+B+C = pi , prove that : cos2A +cos2B +cos2C =-1-4cosAcosBcosC .