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krok68 [10]
3 years ago
13

How to use unit circle to evaluate the six trig functions of theta

Mathematics
1 answer:
Usimov [2.4K]3 years ago
4 0
All you need to know is that sin(x) is the y-value of the coordinate point and cos(x) is the x-value of the coordinate point. From here, tan(x) is just sin(x)/cos(x).
That's three of them already. sec(x) is 1/cos(x), csc(x) = 1/sin(x) and cot(x) = 1/tan(x).
Just to recap:

cos(x) = x-value
sin(x) = y-value
tan(x) = \frac{sin(x)}{cos(x)}
csc(x) =  \frac{1}{sin(x)}
sec(x) = \frac{1}{cos(x)}
cot(x) =  \frac{1}{tan(x)} =  \frac{cos(x)}{sin(x)}

And you are done!
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