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Evaluate cos135^(@)...

Evaluate `cos135^(@)`

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To evaluate \( \cos 135^\circ \), we can follow these steps: ### Step 1: Identify the Quadrant 135° is in the second quadrant. In this quadrant, the cosine function is negative. **Hint:** Remember the CAST rule: In the second quadrant, sine is positive, while cosine and tangent are negative. ### Step 2: Rewrite the Angle ...
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