Help with my last few questions?

Question

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Answer 1

30)

The function is

Find the domain.

31)

Convert into radians.

Convert from degrees to radians multiply by

Option 3 is correct answer.

Answer 2

35)

The value of

Find angle

The value of

Answer 3

37)

Observe the graph,

The graph is represents the sinusoidal wave form.

Since, The graph of the equation is

Graph the domain is

Range is

The sine wave is across x-axis negative to positive leads.

The equation is

Answer 4

38)

Observe the graph,

The graph is represents the sinusoidal wave form.

Since the graph of the equation is

The graph is origin starts from y axis at 2.

Graph the domain is

Range is

The sine wave is across x-axis negative to positive leads.

The equation is