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March 27, 2017

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solve for t:

0=4sin(2t)cos(2t)-sin(2t)

  • math/cal/trig solve for t - ,

    0 = sin(2t)[4 cos(2t) -1]

    There are two possible solutions:
    sin(2t) = 0
    (which leads to t = 0 or pi/2)
    and
    cos(2t) = 1/4
    which leads to other values of t.
    t = (1/2)cos^-1(1/4)

  • math/cal/trig solve for t - ,

    if cos2t=1/4 then t= what??

  • math/cal/trig solve for t - ,

    Cos inverse of 1/4 =2t
    So do cos inverse of 1/4=75.52...
    So...
    75.52...= 2t
    Solve for t.
    T=37.76..

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