Question

Why sin theta is always positive in 2nd quadrant?

Answer 1

For an angle in the fourth quadrant the point P has positive x coordinate andnegative y coordinate. Therefore: InQuadrant IV, cos(θ) > 0, sin(θ) < 0 and tan(θ) < 0 (Cosine positive). Thequadrants in which cosine, sine and tangent are positive are often remembered using a favorite mnemonic.

Answer 2

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QUESTIONS

.Why sin theta is always positive in 2nd quadrant?

ANSWER

For an angle in the fourth quadrant the point P has positive x coordinate and negative y coordinate. Therefore: In Quadrant IV, cos(θ) > 0, sin(θ) < 0 and tan(θ) < 0 (Cosine positive). The quadrants in which cosine, sine and tangent are positive are often remembered using a favorite mnemonic.

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