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angles in trigonometry

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how to find the angle in trigonometry, would apreciate if you could help out with this!

Guest Jun 12, 2017
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You will get something like sin(an angle)= a number from the figure, and then you take the inverse of it.

Example:

$$\tan x = \dfrac{3}{2}\\ x = \tan^{-1}\dfrac{3}{2}\approx56.3^{\circ}$$Last step is done by calculator.

Even this one!!:

$$\sin x =\dfrac{1-\sqrt5}{2}\\ x = \sin^{-1}\dfrac{1-\sqrt5}{2}\approx 321.8^{\circ}$$

MaxWong  Jun 12, 2017

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