Question

Another quick Trig Question!

Is Sin 13 > Sin 12?
&
Cos 13 > Cos 12

and also what about their reciprocals?

Answer 1

Just use a calculator.

Answer 2

If you mean degrees, then use a calculator like @mathstudent55 is saying

http://web2.0calc.com/

sin(12) = 0.207911690818
sin(13) = 0.224951054344

Answer 3

Caution: The sine function increases as the angle increases from zero, then decreases on the open interval (90, 180 degrees), then increases again on the open interval (180, 270 degrees), and so on. Within which open interval do you find the angles 12 degrees and 13 degrees? Would you expect the sine function to increase or decrease there? Based upon your answer, would you say that sin 13 > sin 12, or sin 13 < sin 12?

What are you asking about "their reciprocals?" Be more specific, please.