Introduction to Trigonometry
Trigonometry studies the relationship between angles and sides in triangles. This page provides computational tools and trigonometric equation solving.
Calculate Trigonometric Values
Solve Basic Trigonometric Equations
sin(x) = 0.5
Basic Trigonometric Formulas
Pythagorean
sin²x + cos²x = 1
Double Angle
sin(2x) = 2sin(x)cos(x)
Double Angle
cos(2x) = cos²x - sin²x
Sum Angle
sin(a±b) = sin(a)cos(b) ± cos(a)sin(b)
Sum Angle
cos(a±b) = cos(a)cos(b) ∓ sin(a)sin(b)
Product Formula
sin(a)sin(b) = ½[cos(a-b) - cos(a+b)]