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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 6 million people

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.

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Trigonometric Functions

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

Specific Values of Trigonometric Functions

What is the value of \( \sin 30 ^ \circ \)?

\[ \frac{\sqrt{2}} {2} \] \[ \frac{\sqrt{3}}{2} \] \[ \frac{1}{2} \] \[ 1\]

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by Brilliant Staff

What is the value of \( \cos 45 ^ \circ \)?

\[ \frac{1}{2} \] \[ \frac{\sqrt{2}} {2} \] \[ 1\] \[ \frac{\sqrt{3}}{2} \]

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by Brilliant Staff

What is the value of \( \tan 60 ^ \circ \)?

\[ \sqrt{3} \] \[ 1 \] \[ \frac{1} {\sqrt{3}} \] \[ 0 \]

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by Brilliant Staff

What is the value of \( \sin^2 0 ^ \circ + \cos ^2 90 ^ \circ \)?

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by Brilliant Staff

What is the value of \( \sin (-360^\circ) \) ?

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by Brilliant Staff

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