Trigonometry calculators
22 calculators Cofunction Calculator Find cofunction identities for sin, cos, tan, cot, sec, and csc in degrees or radians. Get the complementary angle, exact value, and a step-by-step breakdown.
Open Cosine Calculator Calculate cos(x) in degrees, radians, or milliradians. Reverse-solve with arccos. Solve triangles with the law of cosines. Step-by-step work included.
Open Law of Cosines Calculator Solve any triangle with the law of cosines. Find the missing side or angle, then get all three angles, area, perimeter, inradius, and circumradius in one step.
Open Law of Sines Calculator Solve any AAS, ASA or SSA triangle instantly. Get the missing side or angle, plus area, perimeter, inradius and circumradius. Ambiguous case flagged automatically.
Open Sine Calculator Calculate sin(x), cos(x), tan(x) and arcsin in degrees or radians. See exact values for 30-60-90 angles, quadrant info, and a full trig reference table.
Open Tangent Calculator Calculate tan of any angle in degrees, radians, gradians, or milliradians. Get sin, cos, cot, sec, csc too, plus inverse tan (arctan) and step-by-step work.
Open Trigonometry Calculator Solve any right triangle from two values. Get all sides, angles, area, perimeter, altitude, and trig ratios with full step-by-step working in degrees or radians.
Open Arccos Calculator (Inverse Cosine) Calculate arccos(x) instantly. Enter any value from -1 to 1 and get the inverse cosine in both degrees and radians, with steps, a reference table, and a curve visual.
Open Arcsin Calculator (Inverse Sine) Arcsin calculator: inverse sine in degrees and radians. Step-by-step working, cos and tan outputs, right-triangle mode, and a standard-values reference table.
Open Arctan Calculator (Inverse Tangent) Calculate arctan(x) instantly. Get the inverse tangent in degrees and radians, with rise/run input mode, step-by-step math, and a reference table of common values.
Open Cosecant Calculator Calculate the cosecant of any angle instantly. Enter degrees, radians, or pi multiples. See the formula, worked steps, the csc graph, and a full reference table.
Open Cotangent Calculator Calculate the cotangent of any angle in degrees, radians, or pi-radians instantly. See the formula, worked steps, a reference table, and a graph of the cot function.
Open Double Angle Formula Calculator Calculate sin(2theta), cos(2theta), and tan(2theta) instantly. Supports degrees, radians, and pi-radians with step-by-step working and all three cosine variants.
Open Half Angle Calculator Calculate sin, cos, tan, csc, sec, and cot of half an angle using the half-angle identities. Enter degrees or radians and see the step-by-step working instantly.
Open Inverse Trigonometric Functions Calculator Calculate all six inverse trigonometric functions instantly. Enter a value to get arcsin, arccos, arctan, arccot, arcsec, and arccsc in both degrees and radians.
Open Phase Shift Calculator Find the phase shift, amplitude, period and vertical shift of any sine or cosine function. Enter A, B, C, D and get instant results with step-by-step working.
Open Power Reducing Calculator Apply the power-reducing identities instantly. Enter any angle in degrees or radians and get sin², cos², tan², sin³, cos³, sin⁴ and cos⁴ with full step-by-step working.
Open Secant Calculator Calculate sec(x) for any angle in degrees, radians, or gradians. Includes inverse secant (arcsecant), step-by-step working, and a reference table of common angles.
Open Sum and Difference Identities Calculator Calculate sin(A+B), cos(A-B), tan(A+B) and all six trig functions using sum and difference identities. Enter two angles in degrees or radians with step-by-step working.
Open Trig Identities Calculator Enter any angle to compute all six trig functions and verify Pythagorean, double-angle, half-angle, and sum/difference identities with full step-by-step workings.
Open Trigonometric Functions Calculator Calculate all six trig functions (sin, cos, tan, csc, sec, cot) and their inverses for any angle in degrees, radians, or gradians. Step-by-step work included.
Open Unit Circle Calculator Find sine, cosine, tangent, cotangent, secant, cosecant, unit circle coordinates, reference angle, and quadrant for any angle in degrees or radians.
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