What is the value of ?
Answer and explanation
Correct answer: B. -1/2
- Step 1: Reduce to the reference angle and apply the sign of the quadrant: . Answer: -1/2. Why not the others: -√2/2: confuses the reference angle or the quadrant sign. √3/2: uses the value of the complementary function. 1/2: takes the wrong sign or ratio.
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