SOLUTION: Hi, evaluate cos(tan ^-1)(-1)) evaluate sec^-1(2)

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Question 898230: Hi,
evaluate

cos(tan ^-1)(-1))

evaluate
sec^-1(2)
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
evaluate
cos(tan ^-1)(-1))=cos(315˚)=√2/2
evaluate
sec^-1(2)=120˚