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Trigonometric Ratios of Allied Angles

the fundament...

Question

the fundamental period, if any, of the functions :
$sin (x / 3)$ is k $π$ , then k is

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Solution

period of $sin a x$ is $\frac{2 π}{a}$
Therefore, period of $sin (\frac{x}{3})$ is $6 π$

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