SOLUTION: Please help me with this problem
Find the exact value of the expression, if it is defined.
cos(cos^{-1}(7/11))
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Find the exact value of the expression, if it is defined.
cos(cos^{-1}(7/11))
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Question 424856: Please help me with this problem
Find the exact value of the expression, if it is defined.
cos(cos^{-1}(7/11)) Answer by jsmallt9(3758) (Show Source):
You can put this solution on YOUR website! cos(cos{-1}(7/11))
Once you learn what cos{-1}(7/11) means, this expression is ridiculously easy. cos{-1}(7/11) represents an angle. Specifically it represents "the angle whose cos is 7/11.
So your expression represents "the cos of the angle whose cos is 7/11". Its like asking "What's the name of the girl named Heather?" Or "What's the sum of those numbers that add up to 100?" So cos(cos{-1}(7/11)) is simply 7/11.
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