what is the equation of Sin90° ?
WOWAMRAN5:
The values of sine (and cosine) are derived from a unit circle (circle with radius 1). It is the horizontal (cosine) and vertical (sine) distance to any point on the circle at any given angle. From the diagram below you can see that when the angle is 90° the vertical distance will be equal to the radius (i.e. 1). This is also why sine and cosine are limited by the domain: -1≤ f(x) ≤1. The horizontal or vertical distance cannot exceed the size of the radius.
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sin theta = Perpendicular / hypotenuse
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