Home
Class 12
MATHS
In DeltaABC" prove that "cos^(2).(A)/(2...

In `DeltaABC" prove that "cos^(2).(A)/(2)+cos^(2).(B)/(2)+cos^(2).(C)/(2)=2+(r)/(2R)`

Promotional Banner

Topper's Solved these Questions

  • IPE:MAY-2015[TS]

    SRISIRI PUBLICATION|Exercise SECTION - B|7 Videos

  • IPE:MAY-2015[AP]

    SRISIRI PUBLICATION|Exercise SECTION - C|7 Videos

  • IPE:MAY-2016 (AP)

    SRISIRI PUBLICATION|Exercise SECTION-3|7 Videos

Similar Questions

Explore conceptually related problems

If A, B , C =pi, then prove that cos ^(2). (A)/(2)+ cos^(2). (C)/(2)- cos^(2). (C)/(2)=2(cos. (A)/(2) cos. (B)/(2)sin. (C)/(2))

In DeltaABC , " find " b cos ^(2).(C)/(2)+c cos^(2).(B)/(2)

In Delta ABC , prove that cos. (A)/(2)+cos. (B)/(2) - cos .(C)/(2)=4cos .(pi+A)/(4) cos. (pi+B)/(4) cos. (pi-C)/(4)

In DeltaABC" prove that "(b-c)^(2)cos^(2).(A)/(2)+(b+c)^(2)sin^(2).(A)/(2)=a^(2)

In DeltaABC prove that (b-c)^(2)cos^(2).(A)/(2)+(b+c)^(2)sin^(2).(A)/(2)=a^(2)

In triangle ABC, prove that cos .(A)/(2)+cos.(B)/(2)+cos. (C)/(2) =4 cos .(pi-A)/(4)cos. (pi-B)/(4) cos.(pi-C)/(4)

If A+B+ C =pi , then prove that cos ^(2) (A/2)+ cos ^(2) (B/2) +cos ^(2) (C/2)=2(1+sin . (A)/(2) sin. (B)/(2) sin. (C)/(2))