Answer:
Answer: sin (312°) = - sin (48°)
Justification:
1) 312° ⇒ 270° < 312° < 360° ⇒ third quadrant ⇒ sign of sin (312°) is negative
2) Acute angle:
angle = 360° - 312° = 48°
⇒ sin (312°) = - sin (48°) ← this is the expression requested.
Using the calculator you can find the value sin (312°) = - sin (48°) ≈ - 0.743
Step-by-step explanation:
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