WORLD FOR CIVIL

Basic Trigonometric Review

For Right Triangles:

1. Pythagorean Law: C² = A² + B²

2. Sine Ø = opposite side/hypotenuse = B/C

3. Cosine Ø = adjacent side/hypotenuse = A/C

4. Tangent Ø = opposite side/adjacent side = B/A

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For Non-Right Triangles:

1. Law of Cosines:
   C² = A² + B² - 2AB cos c
2. Law of Sines:
   (A/sin a) = (B/sin b) = (C/sin c)

Where A,B,C are length of the sides, and a, b, c are the corresponding angles opposite the sides.

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Some general Trigonometric Identities are shown below.