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Which of the following is equal to sin 280°?
a) sin80°
B) cos (-10°)
C) -cos 80°
D)-cos10°

Sagot :

Answer:

Step-by-step explanation:

The value of sin 280° is equal to -cos 80°.

sin 280° = -cos 80°.

Therefore, the correct option is C) -cos 80°.

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