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Math Help - trigonometric identity

  1. #1
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    trigonometric identity

    Hello, i was wondering if anyone could help me with this identity. cosθ + sinθtanθ = 1/cosθ. I've only started learning these and i'm already stuck on this one. I cannot figure it out, could someone show me the solution perhaps, or a nudge in the right direction, thank you.
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    Quote Originally Posted by i_cow044 View Post
    Hello, i was wondering if anyone could help me with this identity. cosθ + sinθtanθ = 1/cosθ. I've only started learning these and i'm already stuck on this one. I cannot figure it out, could someone show me the solution perhaps, or a nudge in the right direction, thank you.
    Hint: write \tan(\theta)=\frac{\sin(\theta)}{\cos(\theta)} and get a common denominator on the left hand side.
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