For 180° < 0 < 360°, which of the primary trigonometric functions may have positive values?
1 answer:
Step-by-step explanation:
Look at the picture.
If 180° < θ < 360°, then θ is in QIII or QIV. Therefore:
In QIII positive values has tangent and cotangent.
In QIV, positive values has cosine.
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