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 one year ago
Find the exact value of sin (arccos (3/5)). For full credit, explain your reasoning.
 one year ago
Find the exact value of sin (arccos (3/5)). For full credit, explain your reasoning.

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myininaya
 one year ago
Best ResponseYou've already chosen the best response.0So if we have x=arccos(3/5) then cos(x)=3/5. Draw a right triangle and use cos(x)=3/5 to find the other missing leg. then evaluate sin(x)

calmat01
 one year ago
Best ResponseYou've already chosen the best response.1Myininaya has it down, abc. You should follow myininaya's hint.

abc12313
 one year ago
Best ResponseYou've already chosen the best response.1im sorry i still dont understand it could you explain it more? like is it like pythagorean therom?

calmat01
 one year ago
Best ResponseYou've already chosen the best response.1Exactly. recall that cosx is just adjacent over the hypotenuse. So, your adj side is 3 and your hypotenuse is 5. Now just find the missing side by applying pythagorean's theorem and then go back and answer your question.

phi
 one year ago
Best ResponseYou've already chosen the best response.0yes For full credit, explain your reasoning.

abc12313
 one year ago
Best ResponseYou've already chosen the best response.1I drew a right triangle I used cos(x)=3/5 to find the other missing leg. I know that cosx is just adjacent over the hypotenuse. So, the adj side is 3 and your hypotenuse is 5. I found the missing side by applying pythagorean's theorem and my answer is 4/5

abc12313
 one year ago
Best ResponseYou've already chosen the best response.1@phi is this a good answer?

phi
 one year ago
Best ResponseYou've already chosen the best response.0yes, sounds good (but I would leave out the "just" in "just adjacent over hypotenuse" I found the missing side by applying pythagorean's theorem I would add "and it is 4" then add the definition of the sin: opposite over adjacent

abc12313
 one year ago
Best ResponseYou've already chosen the best response.1okay thank you so much everyone for all of your help!!!
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