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Question

# Find the range of the function f(x)=−7sinx8.

A
All real numbers greater than or equal to 7 and less than or equal to 7
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B
All real numbers greater than or equal to 7 and less than or equal to 70
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C
All real numbers greater than or equal to 0 and less than or equal to 8
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D
All real numbers greater than or equal to 0 and less than or equal to 18
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E
All real numbers greater than or equal to 18 and less than or equal to 18
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Solution

## The correct option is A All real numbers greater than or equal to −7 and less than or equal to 7The range of sin function is [−1,1]Hence multiplying by 7 only makes the range [−7,7]

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