They probably wanted exact values without using a calculator.
given sinQ = .6 = 6/10 or 3/5
so Q is in a right angled triangle with opposite side of 3 and hypotenuse of 5.
You should recognize the famous 3-4-5 right-angled triangle.
cosQ = 4/5 or .8
tanQ = 3/4 or .75
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