Hello everyone,

I arrived at two solutions for the following trigonometric equation, but my textbook's answer only lists one of them.

Could someone please check if I overlooked a restriction or erred during my solving process?

Thank you very much!

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1. Solve .

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I squared the equation to get:

Applying Pythagorean Theorem:

Let :

Since y = 0.5773;

therefore:

However, the answer given is only (Scroll with mouse to highlight white text -->) 0.96.