Hi, Im not sure how to solve these, although im pretty sure you do it all in the calculator... can someone help me out? sec (arccos 2/3) csc (arccot 3) csc (arccsc 5) tan (arcsec (-radical2)) thanks
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Originally Posted by cokeclassic Hi, Im not sure how to solve these, although im pretty sure you do it all in the calculator... can someone help me out? sec (arccos 2/3) csc (arccot 3) csc (arccsc 5) tan (arcsec (-radical2)) thanks 1. You are supposed to know that (for example) $\displaystyle \cos(\arccos(x))=x$ 2. I'll show you how to do the first question: $\displaystyle \sec \left(\arccos \left(\frac23 \right) \right)=\dfrac1{\cos\left(\arccos \left(\frac23 \right) \right)}=\dfrac32$
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