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Trigonometric Functions

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, interactive explorations.

Used and loved by over 5 million people

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including olympiad champions, researchers, and professionals.

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Concept Quizzes

Trigonometry Warmup
Degrees and Radians
Basic Functions
Specific Values
Reciprocal Functions
Inverse Functions
Bearing Word Problems
Problem Solving

Challenge Quizzes

Level 2
Level 3
Level 4

Trigonometry Warmup

If \(\tan(x) = \frac {5}{12}\), what is the value of \(\sin(x)\)?

\[ \frac{12}{13} \] \[ \frac{13}{5} \] \[ \frac{12}{5} \] \[ \frac{5}{13} \]

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by Brilliant Staff

In the triangle shown, \(\sin \angle\) A = ?

\(\sin \angle \) B \(\tan \angle \) B \(\cos \angle \) B

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by Brilliant Staff

If \(\sin(x) = 0.6,\) what is \(\cos(90^\circ - x)?\)

0.6 1 0.4 0

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by Brilliant Staff

Which characteristic best describes the graph of \(y = \sin x\)?

linear parabolic increasing periodic

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by Brilliant Staff

Which equation could be used to determine the measure of angle \(A ?\)

\[ \tan A = \frac{4}{5}\] \[ \cos A = \frac{4}{5} \] \[ \cos A = \frac{3}{5}\] \[ \sin A = \frac{3}{5} \]

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by Brilliant Staff

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