cosine of 0 is?
The cosine of 0 radians (or 0 degrees) is exactly equal to 1
The cosine of 0 radians (or 0 degrees) is exactly equal to 1.
To understand why, we can refer to the unit circle. The unit circle is a circle with a radius of 1, centered at the origin of a Cartesian coordinate system. Each point on the unit circle corresponds to an angle formed by the positive x-axis.
At 0 radians (or 0 degrees), the point on the unit circle corresponds to the intersection of the positive x-axis with the circumference of the circle. This point is represented by the coordinates (1, 0).
The cosine of an angle is defined as the x-coordinate of the point on the unit circle corresponding to that angle. In this case, the x-coordinate of the point (1, 0) is 1. Therefore, the cosine of 0 radians (or 0 degrees) is 1.
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