Using the Sine function
Sin(x) = 0.5
Then x = Sin^(-1)0.5
x = 30 degrees.
Sin^(-1) in the inverse function on you calculator. . It works for Sin , Cosine and Tangent of any angle.
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distance and angle
It is not. The angle of reference is 2*pi radians or 360 degrees.
because the greek started trig 2000 years ago to work out where they were using the stars
I can give you several sentences.I have to take trigonometry next year.Trigonometry relates to triangles.I never did understand how to do that trigonometry problem.
you use the the 3 trigonometry functions , sin=opposite divided by hypotenuse cos=adjacent divided by hypotenuse tan=opposite divided by adjacent these are used to work out angles and side lengths in right angle triangles only!!! sine,cosine,tangent :)