Trigonometry calculators
14 free trig calculators with step-by-step solutions.
Trig functions
- Trigonometry calculator— Evaluate sin, cos, tan and inverse trig functions
- Unit circle— Exact values for any angle on the unit circle
- Trig identities— Simplify and verify trig identities
- Trig equations— Solve sin(x)=½, cos(2x)=0, etc.
Triangles
- Law of cosines— a² = b² + c² − 2bc·cos(A)
- Law of sines— a/sin(A) = b/sin(B)
Angle analysis
- Reference angle— Acute angle between terminal side and x-axis
- Coterminal angles— Angles that share the same terminal side
- Amplitude— Find amplitude of sinusoidal functions
- Period— Find period of trig functions
Conversions
- Degree ↔ radian— Convert between degrees and radians
- DMS converter— Degrees-minutes-seconds ↔ decimal degrees
- Arc & sector— Arc length and sector area
Inverse functions
- Inverse hyperbolic— asinh, acosh, atanh with logarithmic formulas
- Inverse csc/sec/cot— acsc, asec, acot evaluations
What is trigonometry?
Trigonometry studies relationships between angles and sides of triangles. The six trig functions — sine, cosine, tangent, and their reciprocals — are used in physics, engineering, navigation, and signal processing.
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