Unit Circle Revisited - Example 2

A trigonometric function is a function of an angle. The angle may be in radians or in degrees. The trigonometric functions are commonly defined for angles in the range –90° to +90°. The commonly-used trigonometric functions are sine (sin), cosine (cos), tangent (tan), cotangent (cotan), secant (sech), and cosecant (cosech). The inverse trigonometric functions are the arcsine (arcsin), arccosine (arccos), arctangent (arctan), arccotangent (arccotan), arcsecant (arccosec), and arc cosecant (arccosech).

Recommended Practical Videos

01:26

Derrick H.

Use a special product formula to find each product. See Example 8. $$ \left(6 p^{2}-3\right)^{2} $$

01:14

Maurizia D.

The cost of a long-distance telephone call is $\$.87$ for the first minute and $\$.15$ for each additional minute. Draw a line through the points you plotted in Exercise 61. Find the slope. What does the slope represent?

04:47

Deboney H.

Solve. Remember that graphs can be used to confirm all real solutions. $$ \begin{aligned} &4 x^{2}+9 y^{2}=36,\\ &3 y+2 x=6 \end{aligned} $$

01:39

Stephen R.

Solve the percent problem. $\$240$ is what percent of $\$50$?

Recommended Quiz

Recommended Books

College Algebra

Algebra and Trigonometry 11th

Elementary and Intermediate Algebra 5e

Intermediate Algebra for College Students 7th

Algebra and Trigonometry 10e

Algebra and Trigonometry Real Mathematics, Real People 6th

Video Transcript

were given a point on the terminal side of an angle that is a drawn a standard form, which means it's basically drawn within a unit circle, and we want to find the sun of this angle and the cosign. The sign of this angle is R Y coordinate, which is negative one half the coast sun we get from our X coordinate, and that's going to be a square root of three over to.