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  1. MHB Apprentice

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    #1
    sin\theta 3/5

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    #2
    I've moved this thread to our Trigonometry forum, since this is not a calculus problem, but involves trig. instead.

    I am assuming you've been given:

    $ \displaystyle \sin(\theta)=\frac{3}{5}$

    And you are to find the values of the other 5 trig. functions as a function of $\theta$.

    Since the sine of $\theta$ is positive, we know that $\theta$ is in either Quadrant I or II. To find the cosine of $\theta$, let's consider the Pythagorean identity:

    $ \displaystyle \sin^2(\theta)+\cos^2(\theta)=1$

    Solve this for $\cos(\theta)$, and plug in the given value for $\sin(\theta)$...what do you get?

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