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anonymous
 4 years ago
Evaluate without using a calculator. Give answer in radians and degrees. Show work please or explain it!
anonymous
 4 years ago
Evaluate without using a calculator. Give answer in radians and degrees. Show work please or explain it!

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[\cos^{1}(\sqrt{2}/2) \]

dumbcow
 4 years ago
Best ResponseYou've already chosen the best response.1from the unit circle i know that cos(x) = sqrt(2)/2 when x = 3pi/4 and 5pi/4

dumbcow
 4 years ago
Best ResponseYou've already chosen the best response.1convert to degrees.....pi = 180

dumbcow
 4 years ago
Best ResponseYou've already chosen the best response.1do you need more explanation?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0thank you so its 180 degrees & 3 pi/4 ?

dumbcow
 4 years ago
Best ResponseYou've already chosen the best response.1?? no pi radians is equivalent to 180 degrees there are 2 possible answers (2 diff angles satisfy cos(x) = sqrt2/2) i gave you answers in radians, you have to convert to degrees by replacing pi with 180

dumbcow
 4 years ago
Best ResponseYou've already chosen the best response.1good reference http://www.mathpeer.com/index.php?act=trigonometry&trig=radian_measure_and_the_circular_functions

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0oh... i'm sorry so the answer is 180 degrees & pi ? I don't understand how to get to 180 degrees. :/

dumbcow
 4 years ago
Best ResponseYou've already chosen the best response.1hmm ok apparently i am only confusing you more just look at the unit circle and find sqrt2/2, the answers will be the angle measures

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0i hope i'm not annoying or anything lol you don't have to help me but is the answer for \[\sin^{1} (1)\] = 270 degrees, (3 pi/2) ?
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