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Find the values of the six trigonometric functions of an angle in standard position if the point with coordinates (84, 13) lies on its terminal side.

User Pravnar
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1 Answer

5 votes

Answer:


\sin \theta = 0.153,
\cos \theta = 0.988,
\tan \theta = 0.155,
\cot \theta = 6.462,
\sec \theta = 1.012,
\csc \theta = 6.538

Explanation:

Let be the point
(x,y), the six trigonometric functions of the angle are represented by following formulas:


\sin \theta = \frac{y}{\sqrt{x^(2)+y^(2)}} (1)


\cos \theta = \frac{x}{\sqrt{x^(2)+y^(2)}} (2)


\tan \theta = (\sin \theta)/(\cos \theta) = (y)/(x) (3)


\cot \theta = (1)/(\tan \theta) = (x)/(y) (4)


\sec \theta = (1)/(\cos \theta) = \frac{\sqrt{x^(2)+y^(2)}}{x} (5)


\csc \theta = (1)/(\sin \theta) = \frac{\sqrt{x^(2)+y^(2)}}{y} (6)

If we know that
x = 84 and
y = 13, then the values of the six trigonometric functions is:


\sin \theta = \frac{y}{\sqrt{x^(2)+y^(2)}}


\sin \theta = 0.153


\cos \theta = \frac{x}{\sqrt{x^(2)+y^(2)}}


\cos \theta = 0.988


\tan \theta = (y)/(x)


\tan \theta = 0.155


\cot \theta = (x)/(y)


\cot \theta = 6.462


\sec \theta = \frac{\sqrt{x^(2)+y^(2)}}{x}


\sec \theta = 1.012


\csc \theta = \frac{\sqrt{x^(2)+y^(2)}}{y}


\csc \theta = 6.538

User Nathanael Demacon
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