how do i find the exact solution? 2sin^2x+5sinx-3=0 for 0<x<2pie? there are _ under the< symbol please help
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Rico Grant
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Solve `2sin^2x+5sinx-3=0` for `0<=x<=2pi` :
`2sin^2x+5sinx-3=0`
`(2sinx-1)(sinx+3)=0`
`sinx+3=0 ==>sinx=-3` but the range of sinx is `-1<=y<=1`
`2sinx-1=0==>sinx=1/2`
The sin is equal to 1/2 at `pi/6 +k2pi,(5pi)/6+k2pi` where k is an integer.
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For `0<=x<=2pi` we have `x=pi/6,(5pi)/6`
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The graph:
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