1 мая 2022 г. · The sine function relates a real number t to the y-coordinate of the point where the corresponding angle intercepts the unit circle. Finding Sines and Cosines of... · Using Reference Angles |
Because the sine value is the y-coordinate on the unit circle, the other angle with the same sine will share the same y-value, but have the opposite x-value. |
Quadrant II: sin, csc positive. Quadrant I: all functions positive. Quadrant III: tan, cot positive. Quadrant IV: cos, sec positive. |
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