Today in class we learned about trigonometric functions. Jojo drew a picture of a right triangle on the board and labeled an angle adjacent to the hypotenuse theta. In this triangle, the hypotenuse is labeled r, the vertical leg is y and the horizontal leg is x. Sine, cosine, and tangent are side ratios that you can use to determine unknown angles and sides of triangles. Sine (sin) is the ratio of opposite side over the hypotenuse, or y over r. Cosine (cos) is the ratio of the adjacent side over the hypotenuse, or x over r. And Tangent (tan) is the ratio of the opposite side over the adjacent side, or y over x. This can be remembered by the word SOHCAHTOA which stands for:
Sine
Opposite
Hypotenuse
Cosine
Adjacent
Hypotenuse
Tangent
Opposite
Adjacent
Or as it relates to our math class:
Signs
Of
Hovercrafts
Can
Actually
Harm
Teachers
Of
Arithmetic
Trigonometry is a sine of the times. ~Author Unknown
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