what is the value of cos90
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Cos 90° = 0
For a triangle, ABC having the sides a, b, and c opposite the angles A, B, and C respectively, the cosine law is defined. Also, it is easy to remember the special values like 0°, 30°, 45°, 60°, and 90° since all the values are present in the first quadrant.
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Answer:
The exact value of cos(90) is 0 .
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