EM-3081

Sine and cosine of obtuse angles

E Math · Secondary 4 · Medium · Sine and cosine of obtuse angles

1. $27.2^\circ,\ 152.8^\circ$
2. $27.2^\circ,\ 332.8^\circ$
3. $62.8^\circ,\ 117.2^\circ$
4. $27.2^\circ,\ 90.0^\circ$

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