Chapters

Trigonometric ratios behave in different quadrants. In some cases, they behave the same as well and that is why it becomes necessary for us to understand their behavior. To understand the quadrant effect on trigonometric ratios, you need to understand a few trigonometric identities. These trigonometric identities are split into different types:

1. Acute Angles Trigonometric Identities
2. Supplementary Angles Trigonometric Identities
3. Angles Greater Than or Trigonometric Identities
4. Angles Greater Than or Trigonometric Identities
5. Angles That Differ by or Trigonometric Identities
6. Angles That Add Up to or Trigonometric Identities
7. Angles That Differ by or Trigonometric Identities

## Supplementary Angles

Two angles are supplementary if the sum is  or  radians. So, if two supplementary Angles are added, a straight angle is obtained.

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Shane
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5 (17 reviews)
Matthew
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4.9 (12 reviews)
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## Angles That Differ by 270º or 3/2 π Rad

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