Question

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

Answer 1

Make sure you calculator's MODE is set to RAD measure.

so enter sin (pi/4), your calculator says 0.7071

Answer 2

sin (0) = 0

Answer 3

I got 0.7068

Answer 4

Thats impossible

Answer 5

what did you enter?

Answer 6

I know what you did...you used 3.14 for pi

enter pi using the pi symbol on your calculator.

Answer 7

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

Answer 8

i got 0.0137 lol

Answer 9

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

Answer 10

aha got it thanks :)

Answer 11

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

Answer 12

welcome.

Answer 13

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

Answer 14

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

Answer 15

And use the pi symbol, not 3.14.

Answer 16

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

Answer 17

wow thanks ! :)

Answer 18

welcome.