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What is (\sin(-x)) equal to?

Answer and explanation

Correct answer: \(-\sin x\)

Sine is an odd function. Therefore, changing the sign of the angle changes the sign of its value: \(\sin(-x)=-\sin x\). Choosing \(\sin x\) would apply the even-function rule, so it is incorrect here. Exam tip: \(\sin\) and \(\tan\) are odd functions, whereas \(\cos\) is an even function.

Related tags

Trigonometric FunctionsSineOdd FunctionNegative AnglesClass 11 MathematicsTrigonometric Functions And Their PropertiesMathematicsClass 12 Mcq

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