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prove that sin(n+1)A-sin(n-1)A/cos(n+1)A+2cos(nA)+cos(n-1)A=tanA/2

  1. prove that sin(n+1)A-sin(n-1)A/cos(n+1)A+2cos(nA)+cos(n-1)A=tanA/2
    1. answers icon 0 answers
    2. ankita asked by ankita
    3. views icon 434 views
  2. 1 .If tanA=1/3 and tanB=1/7 (both A and B are acute),calculate 50sin(2A +B)2.1Prove that sin2A+2cosA-2cos^3A/1+sinA =sin2A 2.2
    1. answers icon 1 answer
    2. OwamIII asked by OwamIII
    3. views icon 709 views
  3. 1 .If tanA=1/3 and tanB=1/7 (both A and B are acute),calculate 50sin(2A +B)2.1Prove that sin2A+2cosA-2cos^3A/1+sinA =sin2A 2.2
    1. answers icon 5 answers
    2. tshepo asked by tshepo
    3. views icon 1,044 views
  4. If tan inverse(x^2-y^2/x^2+y^2)=a then prove that dy/dx=x/y (1-tana/1+tana).
    1. answers icon 2 answers
    2. Abhi asked by Abhi
    3. views icon 1,721 views
  5. Prove: 1+(TanA/SinB)^2/1+(TanA/SinC)^2 = 1+(SinA/TanB)^2/1+(SinA/TanC)^2
    1. answers icon 4 answers
    2. Rabin asked by Rabin
    3. views icon 3,793 views
  6. Verify/prove the following:(sinA+tanA)/(1+secA) = sinA ______________________________ tanu = 1+sinu-cos^2u/cosu(1+sinu)
    1. answers icon 1 answer
    2. Kid asked by Kid
    3. views icon 770 views
  7. Prove the identity:tanA/secA+1 = secA-1/tanA Can u please explainit to me step by step? I greatly appreciate your help! Thanks:)
    1. answers icon 2 answers
    2. Kristien asked by Kristien
    3. views icon 595 views
  8. ifm sin B=nsin(2A+B) prove that(m+n)tanA=(m-n)tan(A+B)
    1. answers icon 4 answers
    2. vilas asked by vilas
    3. views icon 3,067 views
  9. If TanA=k.TanB prove that (k+1)sin(A-B)=(k-1)sin(A+B).
    1. answers icon 10 answers
    2. Gunda asked by Gunda
    3. views icon 5,599 views
  10. if tanA/tanB=k,prove that k+1/k-1=sin(A+B)/sin(A+B)
    1. answers icon 1 answer
    2. Shruti raut asked by Shruti raut
    3. views icon 328 views