Complex Numbers on the TI-84 Plus by Thomas G. Cleaver 09/29/16 Introduction The TI-84 Plus has good complex number manipulation capabilities, but it has three deficiencies: You cannot enter a number in polar form; you must use exponential form. When entering an angle in exponential form, the angle must be in radians, even if the MODE is set to degrees. You cannot solve simultaneous complex equations. To get the imaginary number i, use 2nd . (2nd decimal point). To get use 2nd^. π, To get the exponential e use 2nd LN. After entering an exponential as part of an expression, put in a space (forward arrow), or you will continue entering parts of the exponential. Entering Complex Numbers in Rectangular Form (by example) Enter (5 j6) – 1. Key in: (5 6i) – 2. (5-6i) will appear on the screen. Entering Complex Numbers in Polar Form (by example) Enter 7.81/-50.19° 1. Key in: 7.81 × 7.81* will appear on the screen. – 2. Key in: ex (use 2nd LN) 3. Key in: -50.19 × i 180 ÷ π 4. 7.81*e-50.19*πi/180 will appear on the screen. Rectangular to Polar Conversion (by example) Convert (5 j6) 7.81/-50.19° – 1. Key in: MODE 2. Set option 3 to DEGREE 3. Set option 7 to re^θi 4. Key in: 2nd MODE (QUIT) 5. Key in: (5 6i) 7.8102e-50.1944i will appear on the screen. – – Polar to Rectangular Conversion (by example)
Complex Numbers on the TI-84 Plus by Thomas G. Cleaver 09/29/16 Introduction The TI-84 Plus has good complex number manipulation capabilities, but it has three deficiencies: You cannot enter a number in polar form; you must use exponential form. When entering an angle in exponential form, the angle must be in radians, even if the MODE is set to degrees. You cannot solve simultaneous complex equations. To get the imaginary number i, use 2nd . (2nd decimal point). To get π, use 2nd^. To get the exponential e use 2nd LN. After entering an exponential as part of an expression, put in a space (forward arrow), or you will continue entering parts of the exponential. Entering Complex Numbers in Rectangular Form (by example) Enter (5 – j6) 1. Key in: (5 – 6i) 2. (5-6i) will appear on the screen. Entering Complex Numbers in Polar Form (by example) Enter 7.81/-50.19° 1. Key in: 7.81 × – 7.81* will appear on the screen. 2. Key in: ex (use 2nd LN) 3. Key in: -50.19 × π i ÷ 180 4. 7.81*e-50.19*πi/180 will appear on the screen. Rectangular to Polar Conversion (by example) Convert (5 – j6) 7.81/-50.19° 1. Key in: MODE 2. Set option 3 to DEGREE 3. Set option 7 to re^θi 4. Key in: 2nd MODE (QUIT) 5. Key in: (5 – 6i) – 7.8102e-50.1944i will appear on the screen. Polar to Rectangular Conversion (by example)
TI-84PlusComplex.docx