cost

With the function that you entered of cost, plot points, determine the intercepts, domain, range

Since you did not specify a qualifying variable or function notation in your expression, we will assume y
y = cost

Determine function type:

Since we have one of the standard trigonometric functions:
this is a trigonometric function

Now Plot points from pi/6 to 2pi

t	Plug in x	ƒ(t) = cost	Ordered Pair
2π	cos[2π]	1	(2π, 1)
11π/6	cos[11π/6]	0.86602540378444	(11π/6, 0.86602540378444)
7i/4	cos[7i/4]	0.70710678118655	(7i/4, 0.70710678118655)
5π/3	cos[5π/3]	0.5	(5π/3, 0.5)
3π/2	cos[3π/2]	-1.836970198721E-16	(3π/2, -1.836970198721E-16)
4π/3	cos[4π/3]	-0.5	(4π/3, -0.5)
5π/4	cos[5π/4]	-0.70710678118655	(5π/4, -0.70710678118655)
7π/6	cos[7π/6]	-0.86602540378444	(7π/6, -0.86602540378444)
π	cos[π]	-1	(π, -1)
5π/6	cos[5π/6]	-0.86602540378444	(5π/6, -0.86602540378444)
3π/4	cos[3π/4]	-0.70710678118655	(3π/4, -0.70710678118655)
2π/3	cos[2π/3]	-0.5	(2π/3, -0.5)
π/2	cos[π/2]	6.1232339957368E-17	(π/2, 6.1232339957368E-17)
π/3	cos[π/3]	0.5	(π/3, 0.5)
π/4	cos[π/4]	0.70710678118655	(π/4, 0.70710678118655)
π/6	cos[π/6]	0.86602540378444	(π/6, 0.86602540378444)

Determine the y-intercept:

The y-intercept is found when t is set to 0. From the grid above, our y-intercept is 0.86602540378444

Determine the t-intercept

The t-intercept is found when y is set to 0
The y-intercept is found when y is set to 0. From the grid above, our x-intercept is 0

Determine the domain of the function:

The domain represents all values of t that you can enter
The domain is (-∞, ∞) or All Real Number

Determine the range of the function:

The range is all the possible values of y or ƒ(t) that can exist
The range is [-1, 1]

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