What is the value of the sine function at an angle of 30 degrees?
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What is the domain of the function f(x) = sin(x) + cos(x) + tan(x) when x is measured in degrees?
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What is the product of 3 and a mixed number with a whole part of 2 and a fractional part of 1/4? How can you factorize this number? Lastly, what is the result in decimal form?