Trigonometry

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Degrees and Radians Definitions and how to convert one to the other.

Angle Converter Converts degrees, radians, revs, grads, mils, seconds and minutes.

Right Triangle Calculator Solves for any right triangle if you know one angle and the length of any side.

Ultimate Triangle Calculator This solves for ANY type of triangle as long as you know all 3 sides, 2 sides and an included angle or 2 angles and an included side. (It calculates area too.) Knowing all 3 angles, it will calculate the relative lengths of all 3 sides.
Click here for the special case of side-side-angle.

30 60 90 and 45 45 90 Triangles Calculator for these 2 types of special right triangles.

Angular Size Calculator Accurate for angles up to 180 degrees.

Trigonometry Calculator Calculates all 6 trigonometry functions and all 6 arcfunctions. If you need to know the cosecant of 1.37 radians, this is the calculator for you.

Slope and Grade Calculator Trigonometry in the real world. Explains and calculates how to determine a road grade, the pitch of a roof, etc.

Trigonometry Tutorial   A brief review of the basics of trigonometry.

Trigonometry Tutorial Part 2   Solving Oblique Triangles by Using the Law of Sines and Cosines

Trigonometry Tutorial Part 3   Solving Oblique Triangles Without Using the Law of Sines and Cosines

Types of Triangles A chart showing triangles classified by angles (acute, right, obtuse) and by sides (equilateral, isosceles, scalene).
Also has triangle area formulas and a triangle area calculator.

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