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Trig identities and equations AS maths watch

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    I just tried this 6 mark exam question:

    solve 4sinx=3tanx between 0 and 360

    and got answers of 41.4 and 311.4?

    Is this correct because the mark scheme for this question had been missed out. many thanks
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    Did you divide through by sinx? Because that causes you to lose solutions.

    Try factorising instead.
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    (Original post by NotNotBatman)
    Did you divide through by sinx? Because that causes you to lose solutions.

    Try factorising instead.
    dont think i did. have you found more answers and am i correct then? cheers
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    (Original post by Bertybassett)
    dont think i did. have you found more answers and am i correct then? cheers
    if 4sinx = 3tan x then

    sinx(4cosx-3) = 0,

    so sinx= 0 and cosx=3/4

    ...

    you don't have solutions to sinx=0.
 
 
 
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