Actually, I know the answer to this problem -- just trying tosee if I can get it

Question

Actually, I know the answer to this problem -- just trying tosee if I can get it to work on the TI 83 Plus. (2cos 10 + 2i sin 10)^3 = 43 + 4i When entrying these values, then I'll go to 2nd math -- bringup the equal sign (obviously entrying 43 +4i afterwords), Ishould get 1, but I'm getting 0 instead. Please show details if you can get this to work Actually, I know the answer to this problem -- just trying tosee if I can get it to work on the TI 83 Plus. (2cos 10 + 2i sin 10)^3 = 43 + 4i When entrying these values, then I'll go to 2nd math -- bringup the equal sign (obviously entrying 43 +4i afterwords), Ishould get 1, but I'm getting 0 instead. Please show details if you can get this to work

Explanation / Answer

You can do this graphically. Go to your Y= screen and enter like this Y1=(2cos (10) + 2i sin (10))^3 Y2=4(3 + 4i) After this, you'll want both = signs to be bolded. Go to Zoom:Standard Now Graph Find the intersection of the two graphs by hitting2ndTrace (or calc) Select Intersect This isn't working on my calculator because I wasn't sure where theparenthesis were supposed to go in the question, so I must ofguessed wrong. I also don't know too much about the graphs of thetrig functions, but this method works finding the variable for alltypes of equations I hope this helps a little bit at least.

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