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mathsAdvanced TrigonometryTrigonometric Ratio for Angles in All Quadrants

First Quadrant Equivalent of Trigonometric Values

For angles in 2nd, 3rd, and 4th quadrants, can trigonometric ratios be equivalently given as a trigonometric ratio of acute angle in 1st quadrant? In doing so, the sign and the complementary trigonometric ratios are to be appropriately matched.

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