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CosA+cosB-cosC=4COSA/2 cosB/2 SINC/2-1

  1. CosA+cosB-cosC=4COSA/2 cosB/2 SINC/2-1
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    2. Hansika asked by Hansika
    3. views icon 982 views
  2. If A + B + c = 180 then show thatsinA + sinB + sinC=4cosA/2. cosB/2 . cosC/2
    1. answers icon 2 answers
    2. Robert asked by Robert
    3. views icon 1,452 views
  3. IfA+B+C=180°than prove that cosA+cosB-cosC=4cosA/2.sinB/2.cisC/2
    1. answers icon 1 answer
    2. ss0108982 asked by ss0108982
    3. views icon 324 views
  4. if cos(B-C)+cos(C-A)+cos(A-B)=-3/2 then prove that cosA+cosB+cosC=O and sinA+sinB+sinC=O after that prove that
    1. answers icon 1 answer
    2. Binoy kumar mahato asked by Binoy kumar mahato
    3. views icon 2,313 views
  5. in triangle ABC,right-angled at A,if cot B=1, find the value of cosB cosA+sinB sinC
    1. answers icon 1 answer
    2. Anonymous asked by Anonymous
    3. views icon 664 views
  6. Prove that CosB-cosA/cosA+cosB=tanA+B/2tanA-B/2
    1. answers icon 2 answers
    2. Yash Rah asked by Yash Rah
    3. views icon 1,032 views
  7. Prove that1-cosA+cosB-cos(A+B)/1+cosA-cosB-cos(A+B) = tanA/2cotA/2
    1. answers icon 3 answers
    2. Kewal asked by Kewal
    3. views icon 1,739 views
  8. find all solutions in the interval [0,2 pi)sin(x+(3.14/3) + sin(x- 3.14/3) =1 sin^4 x cos^2 x Since sin (a+b) = sina cosb + cosb
    1. answers icon 1 answer
    2. lauren asked by lauren
    3. views icon 848 views
  9. Evaluate tan B tan C if triangle ABC is not a right trianlge and cos A=cosB cosC.
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    2. krista asked by krista
    3. views icon 499 views
  10. 1-cosA+cosB-cos(A+B)/1+cosA-cosB-cos(A+B)=tan(A/2)ct(A/2)
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    2. Kasun asked by Kasun
    3. views icon 496 views