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how would you sketch y= sin^-1 x + cos^-1 x. i know that there is a property where that would equal pie/2, but how do you use it?

hi, i typed this question in the binomial theorem thread, but then i read "withouttaface"'s rules..and well the picture freaked the hell out of me..so im sorry i didnt follow the rules. ok back to the topic..induction (must not get off topic) can anyone explain to me how to do this question...