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March 28, 2017

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find x in DMS if 2sinx-1=cscx

  • trig - ,

    2sinx-1=cscx
    2sin(x)-1 = 1/sin(x)
    2sin²(x)-sin(x)-1=0
    (2sin(x)+1)(sin(x)-1)=0
    sin(x)=-1/2 or sin(x)=1
    can you take it from here?

    Note that sin(x) is positive in the first and second quadrants.

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