Confirming $\arcsin(-\sin(\frac{3\pi}{2}))$

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In summary, the value of $\arcsin(\sin(\frac{−3\pi}{2}))$ is equal to $\frac{\pi}{2}$, as it is equivalent to $\arcsin(-\sin(\frac{3\pi}{2})) = \arcsin(-\sin(\pi+\frac{\pi}{2})) = \arcsin(\sin(\pi/2))$. This is correct, and it can be simplified to save a few lines of working.
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What's $\arcsin(\sin(\frac{−3\pi}{2}))?$ I think it's equal to

$\arcsin(-\sin(\frac{3\pi}{2})) =\arcsin(-\sin(\pi+\frac{\pi}{2})) = \arcsin(\sin(\pi/2)) = \frac{\pi}{2}$

Is this correct?
 
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Guest said:
What's $\arcsin(\sin(\frac{−3\pi}{2}))?$ I think it's equal to

$\arcsin(-\sin(\frac{3\pi}{2})) =\arcsin(-\sin(\pi+\frac{\pi}{2})) = \arcsin(\sin(\pi/2)) = \frac{\pi}{2}$

Is this correct?

Yes it's correct, but if you realize that an angle of $\displaystyle \begin{align*} -\frac{3\,\pi}{2} \end{align*}$ radians is the same as an angle of $\displaystyle \begin{align*} \frac{\pi}{2} \end{align*}$ radians it saves about two lines of working...
 

FAQ: Confirming $\arcsin(-\sin(\frac{3\pi}{2}))$

What is the value of $\arcsin(-\sin(\frac{3\pi}{2}))$?

The value of $\arcsin(-\sin(\frac{3\pi}{2}))$ is undefined. This is because the range of the inverse sine function is limited to $[-\frac{\pi}{2}, \frac{\pi}{2}]$, and $\frac{3\pi}{2}$ falls outside of this range.

Why is the value of $\arcsin(-\sin(\frac{3\pi}{2}))$ undefined?

The value is undefined because the inverse sine function is not defined for values outside of its range. This is due to the fact that there are multiple angles that have the same sine value, so it is not possible to uniquely determine the angle.

Can any restrictions be placed on the input to make the value of $\arcsin(-\sin(\frac{3\pi}{2}))$ defined?

No, there are no restrictions that can be placed on the input to make the value defined. This is because the sine function is periodic, so any multiple of $2\pi$ will also result in an undefined value for the inverse sine function.

What is the domain of the function $\arcsin(-\sin(x))$?

The domain of the function $\arcsin(-\sin(x))$ is the set of all real numbers.

Is there a way to approximate the value of $\arcsin(-\sin(\frac{3\pi}{2}))$?

No, it is not possible to approximate the value of $\arcsin(-\sin(\frac{3\pi}{2}))$ because it is undefined. However, we can approximate the value of $\sin(\frac{3\pi}{2})$ to be -1, which is the value of the inner sine function. But this does not give us any information about the inverse sine function.

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