Home
Class 12
MATHS
If A+B+C = 2S , then P.T cos(S-A)+cos...

If A+B+C = 2S , then
P.T `cos(S-A)+cos(S-B)+cos(S-C)+cosS=4cos.(A)/(2)cos.(B)/(2)cos.(C)/(2)`

Promotional Banner

Topper's Solved these Questions

  • IPE:MARCH-2018[TS]

    SRISIRI PUBLICATION|Exercise SECTION-B (SAQs)|7 Videos

  • IPE:MARCH-2018(TS)

    SRISIRI PUBLICATION|Exercise SECTION-C|6 Videos

  • IPE:MARCH-2019 (AP)

    SRISIRI PUBLICATION|Exercise SECTION - C|5 Videos

Similar Questions

Explore conceptually related problems

IF A+B+C=2S, then prove that cos(S-A)+cos(S-B)+cosC=-1+4cos""(S-A)/2cos""(S-B)/2cos""C/2 .

If A+B+C=2S then prove that the following: cos(S-A)+cos(S-B)+cosC =4cos((S-A)/2)cos((S-B)/2)cosC/2-1

If A +B+C= 2S , then prove that (i) sin (S-A)+sin (S-B) + sin C=4 cos . (S-A)/(2) cos. (S-B)/(2) sin .(C)/(2) (ii) cos (S-A)+cos (S-B)+cos C=-1+4 cos. (S-A)/(2) cos.(S-B)/(2)cos. (C)/(2)

If A+B+C = 2S , then prove that sin(S-A)+sin(S-B)+sinC = 4 cos ((S-A)/2) cos ((S-B)/2) sin C/2 .

If A+B+C=2S then cos^(2)S+cos^(2)(S-A)+cos^(2)(S-B)+cos^(2)(S-C)=

If A+B+C=2S , " then " cos^(2)S + cos^(2)(S-A)+cos^(2)(S-B)+cos^(2)(S-C)=

If A , B , C are angles in a triangle , then prove that sin A + sin B + sin C =4 cos. (A)/(2) cos . (B)/(2) cos .(C)/(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)