Question

If 8 is an angle in standard position and its terminal side passes through the point (21,20), find the exact value of cos 0 in simplest radical form.​

Answer 1

Answer:

so x = 20 , y = -21 , which is in quad IV

r^2= 400+441 = 841

r = √841 = 29

then cos Ø = 20/29

sec Ø = 29/20 = 1.45

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