Six trig functions and properties
sine(sin)
the trigonometric function that is equal to the ratio of the side opposite a given angle (in a right triangle) to the hypotenuse.
opposite over adjacent
cosine(cos)
the trigonometric function that is equal to the ratio of the side adjacent to an acute angle to the hypotenuse.
Adjacent over hypotenuse
tangent(tan)
The length of the side opposite the angle divided by the length of the adjacent side
opposite over adjacent
cosecant(csc)
The length of the hypotenuse divided by the length of the side opposite the angle.
hypotenuse over opposite
secant(sec)
The length of the hypotenuse divided by the length of the adjacent side.
hypotenuse over adjacent
cotangent(cot)
The length of the adjacent side divided by the length of the side opposite the angle.
adjacent over opposite
Fundamentals of trig identities
Reciprocal Identities
Trig identities defining cosecant, secant, and cotangent in terms of sine, cosine, and tangent.
Qoutient Identities
defines the relations for tangent and cotangent in terms of sine and cosine.
Pythagorean Identities
Trig identities relating sine with cosine, tangent with secant, and cotangent with cosecant. Derived from the Pythagorean theorem.
Laws of sines and the law of cosine
Law of Sine
the ratio of each side of a plane triangle to the sine of the opposite angle is the same for all three sides and angles
Law Of Cosine
the square of a side of a plane triangle equals the sum of the squares of the remaining sides minus twice the product of those sides and the cosine of the angle between them
Area formulas for any triangle
Inverse Functions
Trig Graph
