Q. Consider the function h(x)=−(2sin(1−x)+8). Giving your answer in interval notation, find the domain of h−1(x).
Define h(x): The function h(x) is defined as h(x)=−(2sin(1−x)+8). To find the domain of the inverse function h−1(x), we first need to determine the range of the original function h(x), because the domain of h−1(x) will be the range of h(x).
Determine sine function range: The sine function oscillates between −1 and 1. Therefore, 2sin(1−x) will oscillate between −2 and 2. When we subtract this from −8, the resulting values will oscillate between −8−2=−10 and −8+2=−6.
Calculate h(x) range: Since h(x)=−(2sin(1−x)+8), the range of h(x) is from −10 to −6, inclusive. This is because the sine function reaches its maximum and minimum values, and the negative sign in front of the function reflects the values.
Find inverse function domain: The range of h(x) is the interval [−10,−6]. Therefore, the domain of the inverse function h−1(x) is the same interval, [−10,−6].
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