The implied domain of y = Cos-1(sin3x)
The < and > represent greater than equal to or less than equal to (i dont no what key to press to get them)
-1 < sin3x < 1
sin3x = 1
3x = pie/2
x = pie/6
Therefor [-pie/6, pie/6]
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You know that the domain for is .
As you noted, for all x values. Since for every x, sin 3x will produce a number between -1 and 1 and is defined for all these numbers, can you say what the domain is?
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