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How do you use cosine?
cosine = adjacent/hypotenuse. It can be used as other trig functions can.
Are trig functions irrational?
Yes.
Which trigonometric functions are even?
Cosine and secant are even trig functions.
What was the very first recorded step in the development of the trig functions?
The first recorded functions had something to do with the chords of a circle.
What is the period all trigonometric functions?
The basic trigonometric functions have periods of pi or 2pi radians (180 or 360 degrees). But a key property of a trig function is that it can be made to have any periodicity.The basic trigonometric functions have periods of pi or 2pi radians (180 or 360 degrees). But a key property of a trig function is that it can be made to have any periodicity.The basic trigonometric functions have periods of pi or 2pi radians (180 or 360 degrees). But a key property of a trig function is that it can be made to have any periodicity.The basic trigonometric functions have periods of pi or 2pi radians (180 or 360 degrees). But a key property of a trig function is that it can be made to have any periodicity.
