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    solve in the interval 0 < (theta) < 360

    sec^2 (theta) + tan (theta) = 3

    Right so I've changed the Sec^2 to 1+tan^2(theta)

    ...

    so

    tan^2 (theta) + tan (theta) = 2 and now I'm stuck and don't know what to do next any help would be great thanks
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    Let tan(t) = x then solve the quadratic in x.
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    make one side equal to 0 then treat it as a normal quadratic
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    Let tanx = t.

    t^2 + t - 2 = 0

    Factorise.

    Put it back as tanx.

    Find solutions within range.

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    I'm struggling with C3 so bad already, particularly this stuff
    I have the worst teacher ever for it, I have pretty much given up.
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    (Original post by Faeriecakes)
    I'm struggling with C3 so bad already, particularly this stuff
    I have the worst teacher ever for it, I have pretty much given up.
    PM me, i'll help you, for free. I finished my Maths A-level last year and obtained an A* overall with 91 in C3, it really isn't that bad once you get your head around it.
 
 
 
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