Education Technology

Solution 11754: Finding the Complex Conjugate of an Imaginary Number on the TI-89 Family, TI-92 Family, and Voyage™ 200 Graphing Calculators.

How do I find the conjugate of an imaginary number on the TI-89 family, TI-92 family, and Voyage 200 graphing calculators?

Use the conj() function to find the conjugate of an imaginary number. The conj() function is located under the the MATH/Complex menu.

The conj() function can be used with an expression, a list, or a matrix.


• conj(2+3i) will return 2-3i
• conj({2+3i,-i,1-i}) will return the list {2-3i, i, 1+i}
• conj([9, 2-i; 1-i, -i] will return the matrix [9, 2+i; 1+i, i]. The matrix will be in pretty print if Pretty Print mode is turned ON.

For additional instructions, refer to the online guidebook for your calculator.