Jan 2011 core 4 question 6?

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  1. sabna93's Avatar
    1 13-06-2012  19:18
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    Jan 2011 core 4 question 6?
    How does 2tanx+tanx(1-tan^2x) show tanx=0 and tan^2x=3??
  2. EckoGecko's Avatar
    2 13-06-2012  19:25
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    Re: Jan 2011 core 4 question 6?
    2tanx + tanx - tan^3x

    tanx(3-tan^2x)

    so tanx=0 or tan^2x=3

    basically you can expand and factorise or just factorise out the tanx
  3. sabna93's Avatar
    3 13-06-2012  19:30
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    Re: Jan 2011 core 4 question 6?
    thankyou
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