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TRIGONOMETRIC FUNCTIONS
TRIGONOMETRIC FUNCTIONS FOR A RIGHT TRIANGLE
Triangle ABC has a right angle (900) at C and sides of length α, b, c. The trigonometric functions of angle A are defined as follows.
RELATIONSHIP BETWEEN DEGREES AND RADIANS
RELATIONSHIP AMONG TRIGONOMETRIC FUNCTIONS
SIGNS AND VARIATIONS OF TRIGONOMETRIC FUNCTIONS
EXACT VALUES FOR TRIGONOMETRIC FUNCTIONS OF VARIOUS ANGLES
GRAPHS OF TRIGONOMETRIC FUNCTIONS y = sinx y = cosx
y = tanx y = cotx
y = secx y = cscx
ADDITION FORMULAS
FUNCTIONS OF ANGLES IN ALL QUADRANTS IN TERMS OF THOSE IN QUADRANT I
RELATIONSHIPS AMONG FUNCTIONS OF ANGLES IN QUADRANT I
DOUBLE ANGLE FORMULAS
MULTIPLE ANGLE FORMULAS
SUM, DIFFERENCE AND PRODUCT OF TRIGONOMETRIC FUNCTIONS
INVERSE TRIGONOMETRIC FUNCTIONS
If x = sin y then y = sin-1x, i.e. the angle whose sine is x or inverse sine of x, is a many-valued function of x which is a collection of single-valued functions called branches. Similarly the other inverse trigonometric functions are multiple-valued. For many purpose a particular branch is required. This is called the principal branch and the values for this branch are called principal values
PRINCIPAL VALUES FOR INVERSE TRIGONOMETRIC FUNCTIONS
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