Tip:
Highlight text to annotate it
X
>> We will approximate different values using two
different calculators.
Make sure our calculator is in degree mode.
Click on "CLEAR", cosine of pi degrees,
close the parentheses, "ENTER".
On this calculator, we type in "pi" first, the calculator is set
in degree mode already.
We press cosine button.
Our approximation is 0.998, that's rounded
to three decimal places.
We will approximate sine of negative 0.325 radian.
Since we don't see the little circle
on the top right corner, it is in radian.
We click on "MODE", make sure we select radian first.
"CLEAR", type in sine, negative.
Do not use the subtraction sign. Point 3 2 5
close the parentheses, press "ENTER".
For the calculator on the left: this calculator is always
in degree mode, so we have to convert negative point 3 2 5
into degrees first so we type in point 3 2 5, press the plus
or minus key, times 180, divided by pi, press the equal sign.
This is the equivalent value
of negative 0.325 radian into degrees.
Press the sine button, the approximation is negative 0.319.