trig help

[zenith elbow]

I need help with question 2, I got the answer, but it doesn’t fall within the range of the interval. Not sure whether the answer is no solutions or something else

[zenith elbow]

This is the arcsin interval

[valid basin]

For this to make this fall into range u will need to substract 3pi/2 with 2pi which will give u -pi/2 because as you know sin graphs repeats every 2pi

[zenith elbow]

Thank you 🙏

I just remembered we can use negative radians

[valid basin]

Ahhahaha that too u can use tht

[zenith elbow]

Thank you bro

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