16 FOCUSED TOOLS
Trigonometry calculators
Work with angles, side ratios and the sine and cosine rules.
Choose the right calculation
These tools take degrees unless stated otherwise. A right-triangle ratio and the law of cosines solve different input patterns. For the sine rule, identify which side is opposite each supplied angle.
Find a tool for your question
Sine Calculator
Find the sine of an angle entered in degrees.
Cosine Calculator
Find the cosine of an angle entered in degrees.
Tangent Calculator
Find the tangent of an angle in degrees away from vertical asymptotes.
Arcsine Calculator
Find the principal angle whose sine equals a chosen ratio.
Arccosine Calculator
Find the principal angle whose cosine equals a chosen ratio.
Arctangent Calculator
Find the principal angle corresponding to a tangent ratio.
Law of Cosines Calculator
Find a triangle’s third side from two sides and their included angle.
Law of Sines Side Calculator
Find a triangle side using two known opposite angle-side relationships.
Secant Calculator
Find the reciprocal cosine of an angle entered in degrees.
Cosecant Calculator
Find the reciprocal sine of an angle entered in degrees.
Cotangent Calculator
Find the cotangent of an angle entered in degrees.
Hyperbolic Sine Calculator
Evaluate hyperbolic sine for a real argument.
Hyperbolic Cosine Calculator
Evaluate hyperbolic cosine for a real argument.
Hyperbolic Tangent Calculator
Evaluate the hyperbolic tangent of a real argument.
Triangle Third Angle Calculator
Find a triangle’s missing angle from the other two interior angles.
Angle From Rise and Run Calculator
Convert a measured rise-and-run ratio into an inclination angle.
Are the angle inputs in degrees or radians?
The trigonometry tools here label angles in degrees and convert internally. Use the degree-to-radian converter when another formula requires radians.
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