Home
Class 12
MATHS
यदि A+B+C=pi हो, तो सिद्ध कीजिए कि - cos...

यदि `A+B+C=pi` हो, तो सिद्ध कीजिए कि - `cos2A+cos2B+cos2C=-1-4cosAcosBcosC`.

Promotional Banner

Similar Questions

Explore conceptually related problems

Theorem 2:cos2A+cos2B+cos2C=-1-4cos A cos B cos C

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

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

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

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

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

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

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

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

In triangleABC,A+B+C=pi ,show that cos2A+cos2B+cos2C=-1-4cosAcosBcosC