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Online Trigonometric Functions (Radians in π)

Get sin, cos, and tan for an angle in radians as a multiple of π (e.g. π/2, π/4).

Frequently Asked Questions

What format do I use?
Enter a multiple of π, e.g. 1 for π, 0.5 for π/2, or 1/2 for π/2. The calculator interprets it as radians.
How is the input parsed?
You can enter a number (coefficient of π) like 0.5 or a fraction like 1/2; both mean π/2 radians.

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