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  2. Top | #2

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  4. Top | #4

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    Tan4x cotx = 0
    2sin 2x + 2 cos 2x = 6

  5. Top | #5

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    Tan4x cotx = 0
    2sin 2x + 2 cos 2x = 6
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    sin4x sinx - cos4x cosx =0


    \\

  9. Top | #9

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    tan4x- cotx =0
    tan4x - cotx = 0
    tan4x = cotx
    tan4x = tan (90 -x)
    4x = 90 -x
    5x=90
    x = 18

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