Trigonometric Ratios For Any Angle - Quadrant by Quadrant

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Watch this video to learn how you can determine the primary trigonometric ratios for any angle, especially those that are over 90 degrees.
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please, what's the name of the software you used as your black board?

ebenezergyimah
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Theta angle is outside of the triangle in 2nd, 3rd, 4th

Shefa-ltlf
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I have only one doubt. If the angle is outside of the Triangle, then how are you measuring It's ratios? It does not have any side, cause It's not inside a triangle. So how are you measuring the ratios, if there are no Opposite or Adjacent side of that angle?

abdullahtauhid