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Math Help - Trigonometric Functions

  1. #1
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    Trigonometric Functions

    Let t = theta for short

    (1) If cot(t) = -2, find cot(t + pi)

    (2) If cos(t) = 2/3, find sec(t)

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  2. #2
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    Hello,

    I think that...
    cot(t)=1/tan(t),
    tan(t+pi)=tan t,
    sec(t)=1/cos(t).

    Bye.
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  3. #3
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    Quote Originally Posted by magentarita View Post
    Let t = theta for short

    (1) If cot(t) = -2, find cot(t + pi)

    (2) If cos(t) = 2/3, find sec(t)
    Use the following rules:

    \cot \left(\theta + \pi\right) =  \cot \theta

    \sec \theta = \frac{1}{\cos \theta}
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  4. #4
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    ok...

    Thanks Air.
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