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Geometry 8.2c, Calculating Trig Ratios with a Trig Table

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First published at 13:58 UTC on November 22nd, 2018.

JoAnn's School

JoAnnsSchool

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We use a trig table (trigonometric table) to find a missing length of a right triangle. We solve a problem from the previous video (when we used a calculator) about a wheelchair ramp by using a trig table. We use the mnemonic soh-cah-toa to help us decide which legs to use. We round a decimal to the closest degree on the trig table. We also find sinA to the closest degree, find the difference between the two options, then decide which one to use. How finding the sine will help us find the cosine.

Geometry 8.2a, Trigonometric Ratios, introducing Sine, Cosine, Tangent
https://youtu.be/z_r8PGb-NqM

Geometry 8.2b, Finding & Calculating Trigonometric Ratios
https://youtu.be/R8NshjG6guo

High School Geometry Playlist
https://www.youtube.com/playlist?list=PLKi4WTp6PRGVBM1nPhwW1lTuxi32Q0IZ3

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