- When angle A is in standard position at the graph's origin (0,0) then sin A equals (y/r).

Since r is the hypotenuse of a right triangle, r can be found from point D(x,y) using x

Consequently, sin A can also be described as (opposite side)/(hypotenuse).

sin(A) = o/h = y/r .

- When angle A is in standard position at the graph's origin (0,0) then cos A equals (x/r).

Also cos A can be described as (adjacent side)/(hypotenuse).

cos(A) = a/h = x/r .

- When angle A is in standard position at the graph's origin (0,0) then tan A equals the ratio = (y/x).

Also tan A equals (opposite)/(adjacent).

tan(A) = o/a = y/x .

- A memory aid for Sine, Cosine & Tangent ratios in a right triangle is ' soh,cah,toa '.

- Your Score Report appears after you have made 6 choices.

- Your Game Score is reduced by the number of butterfly hits.

- To slow the game speed repeat tap/click on the word

- To increase the game speed repeat tap/click on the word Math.

- Speed can also be adjusted with a keyboard's - and + keys.

- Refresh/Reload the web page to restart the game.

- Adjust the sound level of media on your device.

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