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Published byAdolfo Tibbals Modified over 3 years ago

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SOHCAHTOA TOA CAH SOH The three trigonometric ratios for right angled triangles are considered here. Click on a box to select a ratio.

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SOHCAHTOA SOH On the unit circle sin is observed sin 1 Back to menu

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SOHCAHTOA sin 1 SOH Now take a similar triangle

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SOHCAHTOA Opp Hyp By similar triangles SOH = sin = sin 1

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SOHCAHTOA cos 1 CAH On the unit circle cos is observed Back to menu

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SOHCAHTOA cos 1 CAH Now take a similar triangle

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SOHCAHTOA Adj Hyp By similar triangles CAH = cos = cos 1

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SOHCAHTOA TOA On the unit circle tan is observed tan 1 1 Back to menu

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SOHCAHTOA TOA tan 1 Now take a similar triangle

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SOHCAHTOA By similar triangles TOA Adj Opp tan 1 tan = =

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9.5 Trigonometric Ratios Sin-Cos-Tan. What is Trigonometry? Trigonometry (from Greek trigōnon "triangle" + metron "measure") is a branch of mathematics.

9.5 Trigonometric Ratios Sin-Cos-Tan. What is Trigonometry? Trigonometry (from Greek trigōnon "triangle" + metron "measure") is a branch of mathematics.

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