fx-82MS fx-82TL fx-9860GII TI-83
√
On a Casio calculator you can take the square root
√ r
SHIFT x²
or via the CATALOG as
CATALOG INPUT SHIFT 4 √ F1
Example 0
To calculate √-1 = i
√ √-1 SHIFT x² (–) 1 EXE i
Be sure to select SET UP Complex Mode a+bi.
Example 1
To calculate √64 = 8
√ SHIFT x² √▯ 6 4 EXE √64 8
Example 2
To calculate √0 = 0
√ SHIFT x² 0 EXE √0 0
Example 3
To calculate √2 = 1.4142…
√ SHIFT x² 2 EXE √2 F↔D √2 √2 1.414213562
Example 4
To calculate √2 × √2 = 2
√ √ SHIFT x² 2 ▷ × SHIFT x² 2 EXE √2×√2 2
Example 5
To calculate √2√2 = 1.6325…
√ √ √2√2 SHIFT x² 2 ▷ ∧ SHIFT x² 2 EXE 1.632526919
Example 6
To calculate (√2√2)√2 = 2
√ √ √2√2 SHIFT x² 2 ▷ ∧ SHIFT x² 2 EXE 1.632526919
and then
√ Ans√2 ∧ SHIFT x² 2 EXE 2
Example 7
To calculate 2√2 = 2.6651…
√ 2√2 2 ∧ SHIFT x² 2 EXE 2.665144143
Example 8
To enter √-2
√
Non-Real ERROR Press:[EXIT] SHIFT x² (–) 2 EXE √-2
The square root from a negative number always gives a message.
Example 9
To calculate √(−1)² = 1
√ r SHIFT x² ( (–) 1 ) x² EXE √(-1)² 1
Example 10
To calculate ln (√7) = ½ ln (7) = 0.97295...
√ ln SHIFT x² 7 EXE ln √7 0.9729550745
and also
1 ab/c 2 ▷ ln 7 EXE ln 7
0.9729550745
Example 11
To calculate
√ 2 SHIFT x² 1 ab/c 2 EXE 2 √2
Example 12
To calculate
√ r i Z SHIFT x² SHIFT 0 EXE √i