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A + B = pi/4

  • 12-06-2005 10:48am
    #1
    timcraft.tk
    Closed Accounts Posts: 24 ✭


    I'm currently studying for the maths test 2morrow, and coming across this q.
    A + B = pi/4
    write tanA in terms of tanA
    any help will be greatly appreaciate, and gud luck wit the paper II and the rest!


Comments

  • #2
    JackKelly
    Registered Users, Registered Users 2 Posts: 3,225 ✭✭✭JackKelly


    timcraft.tk wrote:
    I'm currently studying for the maths test 2morrow, and coming across this q.
    A + B = pi/4
    write tanA in terms of tanA
    any help will be greatly appreaciate, and gud luck wit the paper II and the rest!

    Write Tan A in Terms of Tan A? um...in terms of B no?

    Well if A + B = pi/4, than

    Tan(A + B) = Tan(pi/4)
    Tan(A + B) = 1

    TanA + TanB = 1
    1-TanATanB

    Than if you want it in terms of B or A, rearrange.... i presume!


  • #3
    timcraft.tk
    Closed Accounts Posts: 24 ✭timcraft.tk


    sorry, my bad. It's tan A in terms of tan B, or vv


  • #4
    andrew163
    Registered Users, Registered Users 2 Posts: 856 ✭✭✭andrew163 


    A + B = pi/4

tan(A + B) = Tan(pi/4)
tan(A + B) = 1

[u]tanA + tanB[/u] = 1
1 - tanAtanB

tanA + tanB = 1-tanAtanB
tanA + tanAtanB = 1 - tanB

tanA(1 + tanB) = 1 - tanB
tanA = [u]1 - tanB[/u]
       1 + tanB


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