The point (3, -4) is on the terminal side of an angle 0. What is cos 0? A. -3/5, B. 3/5, C. -3/4, D. 3/4, E. 3
1 answer:
Well, notice the picture below
recall cosine is adjacent over hypotenuse
what's the hypotenuse? well, you can just use the pythagorean theorem to get "c" or hypotenuse
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