Let's consider a right triangle with hypotenus of 1 unit. You may drag the point C below and observe the change of the angle. Recall that
Point E is (x, sin x), point F is (x, cos x) and point G is (x, tan x). Observe the position of point E, F or G as you drag point C. You may choose the desire graph at the right bottom corner of the graph.
If you wish to know more about trigonometric functions, please click on the function you are interested under Trigonometry at the left column.
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