Question

if t=pi/4 what is cos and sin

Answer 1

sin(1/4pi) = cos(1/4pi) = \[{ 1 \over 2} \sqrt{2}\]

Answer 2

\[\cos(\pi/4)\ \approx .99990605\]
\[\sin(\pi/4)\approx .01370735\]

Answer 3

remember to put your calculator on radians

Answer 4

That's true, he did not specify one way or the other though.

Answer 5

fair enough, but when you see pi it's usually radians :)

Answer 6

http://www.regentsprep.org/Regents/math/algtrig/ATT5/unitcircle.htm

Answer 7

ok i have a similar question t=pi/2, what is cos, and sin...why would sin be cos(1/2pi)

Answer 8

look at the link I posted , the answer is there.

Answer 9

Yes, he is right. The sin value is the y value, and cos in the x value, using your unit circle, you can find the points needed.

Answer 10

fiddle, the link says pi/2 (0,1)...how can i interpet that with relevance to my question

Answer 11

oh now that makes sense thx