use a calculator to evaluate each trigonometric ratio, to four decimal places 1) sin pie/4 (answer 0.7071) Not sure how they got this

Question

anonymous · Answer

Make sure you calculator's MODE is set to RAD measure.

so enter sin (pi/4), your calculator says 0.7071

anonymous · Answer

sin (0) = 0

anonymous · Answer

I got 0.7068

anonymous · Answer

Thats impossible

anonymous · Answer

what did you enter?

anonymous · Answer

I know what you did...you used 3.14 for pi

enter pi using the pi symbol on your calculator.

anonymous · Answer

You MUST use the pi symbol, and you CANNOT round pi to 3.14.

anonymous · Answer

i got 0.0137 lol

anonymous · Answer

Again, did you set your calculator to RAD???

anonymous · Answer

aha got it thanks :)

anonymous · Answer

i got that in degrees but then i converted into radians and i got 
0.000239238459 radians

anonymous · Answer

welcome.

anonymous · Answer

do I always put it to rad when the number isn't in degrees?

anonymous · Answer

Yes. Any expression containing pi will automatically be in RAD (radian) measure.

anonymous · Answer

And use the pi symbol, not 3.14.

anonymous · Answer

pi is not 3.14,
3.14 is only an approximation for pi.

anonymous · Answer

wow thanks ! :)

anonymous · Answer

welcome.