By using the distance formula
The tangent of the given angles are the ratios <em>y</em> to the <em>x</em> coordinate of
the point of the terminal side on the unit circle.
The correct options are;
<h3>How to find the points on the unit circle</h3>
The tangent of an angle is given as follows;

First angle
An angle given is; 
Therefore;

The above result can be obtained as follows;

Which is obtained when we have;

Therefore
The required coordinates is therefore;
Second angle
The angle,
, gives; 
The above value can be obtained as follows;

Which gives;
Third angle
The angle 210° gives; tan(210°) =
, which can be obtained as follows;

Therefore;
Learn more about the unit circle here:
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Answer:
40cm
Step-by-step explanation:
1. To find the missing leg, use the Pythagorean theorem a²+ b² = c² and substitute the numbers a² + 8² = 17².
2. So a = 15 since 17²-8² = 289 - 64 =225 and the square root of 225 is 15
3. Now that all the lengths have been found. So the perimeter of the right triangle is 40cm.
The ratio ...
... seniors : juniors = 3 : 2
can be multiplied by 7 to get
... = 21 : 14
indicating there are 14 juniors for the 21 seniors in the choir.
Area of a triangle = 1/2 b•h
A = 1/2 b • h
A = 1/2 (10 cm • 9 cm)
A = 1/2 (90 cm^2)
A = 45 cm^2.