SOHCAHTOA TOA CAH SOH The three trigonometric ratios for right angled triangles are considered here. Click on a box to select a ratio.
SOHCAHTOA SOH On the unit circle sin is observed sin 1 Back to menu
SOHCAHTOA sin 1 SOH Now take a similar triangle
SOHCAHTOA Opp Hyp By similar triangles SOH = sin = sin 1
SOHCAHTOA cos 1 CAH On the unit circle cos is observed Back to menu
SOHCAHTOA cos 1 CAH Now take a similar triangle
SOHCAHTOA Adj Hyp By similar triangles CAH = cos = cos 1
SOHCAHTOA TOA On the unit circle tan is observed tan 1 1 Back to menu
SOHCAHTOA TOA tan 1 Now take a similar triangle
SOHCAHTOA By similar triangles TOA Adj Opp tan 1 tan = =