Question

Find the exact value of the trigonometric function.
sin 315°

Answer 1

isnt the answer \[-1/\sqrt{2}\]

Answer 2

or \[-1\sqrt{2}/2\]

Answer 3

-rt(2)/2

Answer 4

-rt(2)/2??? im lost. im sorry my teacher never said anything about that

Answer 5

same as ur ans ....

Answer 6

−1/√2

Answer 7

??? that

Answer 8

ok yeah thats what i thought. the sign can only be on the top right? its never suppose to be on the bottom.

Answer 9

yaa... hope u r clear ...

Answer 10

yeah that makes so much sense.

Answer 11

thank you darling.

Answer 12

4th quadrant so sin is neg.
this is 45 deg angle so \[\sin 315^{\circ} = -\frac{ \sqrt{2} }{ 2 }\]

Answer 13

ur welcome

Answer 14

top, bottom, middle is all the same... just a negative number

Answer 15

315 = 360-45 then sine315=-sine 45=-1/√2