Save guides, add subjects and pick up where you left off with your BBC account. What do you think the graph of \(y = \cos 2x^\circ\) would look like? amplitude = 1, so the distance between the ...

Calculate the angle QPR. Give the answer to one decimal place. Label the sides of the triangle \(o\), \(a\) and \(h\). Next choose the correct ratio from \(s^o_h~c^a_h~t^o_a\). In the triangle the ...

but many fail to make the leap on how crucial circles are for trig functions. With static graphs and equations, it's possible to get a handle on the rules of what various functions do and mean.