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March 26, 2017

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SIMPLIFY
1. ((x/4)-(1/x)) / ((1/2x)+(1/4))

VERIFY
1. secXsin2X = (2-2cos^2X)/sinX

  • Math - ,

    ((x/4)-(1/x)) / ((1/2x)+(1/4))
    ((x^2-4)/4x) / ((2+x)/4x)
    (x^2-4) / (x+2)
    (x+2)(x-2)/(x+2)
    x-2

    secX*2sinXcosX = 2(1-cos^2X)/sinX
    2sinX = 2sin^2X/sinX
    2sinX = 2sinX

  • Math - ,

    OMG thank you so much!

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