posted by .

prove 1-cosB divided by 1+cosB= tan^2B/2

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    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 sina and sin (a-b) = sina cosb - cosb sina, the first problem can be written 2 sin x cos (pi/3)= sin …
  2. precal

    Evaluate tan B tan C if triangle ABC is not a right trianlge and cos A=cosB cosC.
  3. trig

  4. mathematics

    if sinA+sinB=x and cosA-cosB=y then find tan[(A-B)/2]
  5. Trigonometry

    Prove that 1-cosA+cosB-cos(A+B)/1+cosA-cosB-cos(A+B) = tanA/2cotA/2
  6. Math

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

    If 1/sinA+1/cosA =1/sinB+1/cosB, prove that: cot(A/2+B/2) = TanA. TanB
  8. Maths

    Prove that CosB-cosA/cosA+cosB=tanA+B/2tanA-B/2
  9. Math2

    IF (1/SinA)+(1/cosA)= (1/sinB)+(1/cosB) Prove that cot((A+B)/2)=tanA tanB Please helppppppppppp
  10. math

    Given that [sin(A-B)/cos(A+B)]=1/3[tan(A-B)], find the values of cosB if sinA=1/2

More Similar Questions