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Which Angle Is Negative Cos? [Solved]

The cosine of an obtuse angle is negative because of the range of the cosine function which is between 1 and -1.

Sine and Cosine of a Negative Angle

We get positive

Where is Sine/Cosine Positive or Negative?

Trigonometric understanding comes in layers. I explain how to find out whether the

Trigonometry - Negative angle identities

If you have a