Pessimist Singularitarian
#2
November 8th, 2016,
06:19
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?