3 years ago

Why is cos(180°) negative? please help me explain in words:)

1 answer:

5 0

Cos 0 and cos 180 are both = 1 and -1, respectively. The cosine of an angle is the ratio of the two sides of a triangle “adjacent/hypotenuse”. Whether the angle is 0 or 180, the adjacent side and the hypotenuse coincide and so both are of the same length so the ratio of adjacent to hypotenuse will be 1.0.

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