Question

how can i determine which of the two trigonometric values is larger in a, b, and c ?

a) cos pi/12 or sin pi/12
b) cos 18 degrees or cos 54 degrees
c) cos 320 degrees or sin 290 degrees

Answer 1

look up the unit circle

Answer 2

for cos. The higher the degree up to 90 the lower the value. from 90 to 180 the value increases. for sin it is the opposite. **UNIT CIRCLE**

Answer 3

okay. im checking it out

Answer 4

okay, well for a) it says cos pi/12 and sin pi/12, how will i know where the pi/12 is??

Answer 5

@ChmE

Answer 6

its half of pi/6

Answer 7

cos is the x value and sin in the y value

Answer 8

you can see the the y value increases to 90 then goes back down. x value it opposite

Answer 9

oh...okay i didnt see that. so then the cos would be larger because its sqrt3/2 ?

Answer 10

x value is greater than the y value right. more right than up. so cos pi/12 is bigger