Level 449
Level 451

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Trigonometric Identites

a trigonometric equation that is true for all values of the variable for which both sides of the equation are defined.

Representatives Part

simplest domain value

Trigonometric Ratios

The values of the trigonometric are positive

Law of Sines

the sines of the angles of a triangle to the length of their opposite sides

Law of Cosines

relates the length of a side of any triangle to the measure of the opposite angle

double angle identities

trigonometric functions of angles equal to 2α in terms of α, which can simplify the functions and make it easier to perform more complex calculations, such as integration, on them.

half angle identites

trigonometric functions of angles equal to α/2 in terms of α, which can simplify the functions and make it easier to perform more complex calculations, such as integration, on them

Identity

an equation that is true for all values of "x"for which the expressions in the equation are defined.

degree mode

calculator set to where all answers will be in radians

additive

identity element (as 0 in the group of whole numbers under the operation of addition) that in a given mathematical system leaves unchanged any element to which it is added

cofunction

The trigonometric function of the complement of an angle. The tangent, for example, is the cofunction of the cotangent.

domain of validity

the set of values of the variable for which all expressions in the equation are defined.