What is the domain of f(x)=sinxf(x)=sinx? Precalculus Functions Defined and Notation Domain 1 Answer Massimiliano Mar 2, 2015 The sinus function has no restrictions, so: D=(-oo,+oo)D=(−∞,+∞). Answer link Related questions What is the domain of a function? What are common mistakes students make when working with domain? How does the domain of a function relate to its x-values? What is the domain of a linear function? What is the domain of a quadratic function? What is the domain of a function like f(x) = 5x^2f(x)=5x2? What is the domain of f(x) = {(1, 2), (3, 4), (5, 6), (7, 8), (9, 10), (10, 10)}f(x)={(1,2),(3,4),(5,6),(7,8),(9,10),(10,10)}? What is the domain of f(x) = xf(x)=x? How do I find the domain of the function f(x) = 2xf(x)=2x? How do I find the domain of the function f(x)=5x^2+2x-1f(x)=5x2+2x−1? See all questions in Domain Impact of this question 4293 views around the world You can reuse this answer Creative Commons License