![]() See how this is an easy way to allow you to remember which trigonometric ratios will be positive? In quadrant two, only sine will be positive while cosine and tangent will be negative. What this tells us is that if we have a triangle in quadrant one, sine, cosine and tangent will all be positive. Lastly, in quadrant 4, x is positive while y is negative. In quadrant 3, both x and y are negative. In quadrant 2, x is negative while y is still positive. In quadrant 1, both x and y are positive in value. ![]() In the above graphic, we have quadrant 1 2 3 4. ASTC will help you remember how to reconstruct this diagram so you can use it when you're met with trigonometry quadrants in your test questions. You can even use this diagram as a trigonometry cheat sheet.
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