Pre-Calculus Inverse Trig Help Needed!

Could someone please help me with this question? I reviewed all of my notes and I have no idea how to decipher this problem. I started to type what I thought was correct, but I'm sure it isn't. Thanks for your help in advance!
 
lilytaylor2003 said:
Could someone please help me with this question? I reviewed all of my notes and I have no idea how to decipher this problem. I started to type what I thought was correct, but I'm sure it isn't. Thanks for your help in advance!
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We are all ready to help - if only we knew where would you need help!! You have to tell us that starting point by showing your work.

Please show us what you have tried and exactly where you are stuck.

Please follow the rules of posting in this forum, as enunciated at:


Please share your work/thoughts about this problem.

Expression 1 is undefined because

cos-1(2) is undefined - because cos(Θ) =2 is undefined (non-existent).
 
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Hi! I attached a picture of the question and my explanation. Please let me know if you can’t see it! Thanks!
 
This question seems to be being used to "update your grade". Is it fair then to ask for help??
 
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