In which quadrant of the Cartesian plane are both the sine and tangent functions negative, while cosine is positive?
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Quadrant IV
In the fourth quadrant (270° to 360°), the x-coordinate is positive and the y-coordinate is negative. This makes cosine (x/r) positive, while sine (y/r) and tangent (y/x) are negative.
Also asked as:
- In which quadrant is the cosine function positive while the sine and tangent functions are negative?