fx-82MS fx-82TL fx-9860GII TI-83
COS
On a TI calculator you can calculate the cosine
COS
or via the CATALOG as
CATALOG ⎵ 2nd 0 ►cos( ENTER
Exemple 1
To calculate cos (0) = 1
COS 0 ENTER cos(0 1
Exemple 2
To calculate cos (π) = -1
π H COS 2nd ∧ ENTER cos(π -1
Example 3
To calculate cos (180°) = -1
COS 1 8 0 ENTER cos(180 -1
Example 4
To calculate cos (½π) = 0
π H COS · 5 2nd ∧ ENTER cos( .5π 0
Example 5
To calculate sec (0) = 1
COS 0 ) x⁻¹ ENTER Ans⁻¹ 1