sin 30°
- Input
- 30°
- Expected output
- 0,5
Notable value.
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sine cosine and tangent
In a right triangle, sine = opposite/hypotenuse, cosine = adjacent/hypotenuse, tangent = opposite/adjacent.
Notable value.
sin = cos.
It's the circle of radius 1 centered at the origin. For an angle measured from the x-axis, the point on the circle has coordinates (cos θ, sin θ), giving the trig functions a geometric meaning.
Mnemonic: Sine = Opposite/Hypotenuse, Cosine = Adjacent/Hypotenuse, Tangent = Opposite/Adjacent.
Because cos 90° = 0 and tangent is sine divided by cosine.
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