Question

For what x-value(s) does sin(x) = 1?
-90°
270°
all of the above
none of the above

Answer 1

all of the above? right yes

Answer 2

no

Answer 3

\(\sin(-90)=-1\)

Answer 4

Nope. Recall that sin(-x) is -sin(x).

Answer 5

oh

Answer 6

as does \(\sin(270)=-1\)

Answer 7

so its none -.-

Answer 8

wow. i thought i had it right

Answer 9

none

Answer 10

remember that the value of sin(x) is the y component of the vector from the origin of the unit circle to the edge. So if the angle points below the x-axis, the value of sin(x) is negative.

Answer 11

thanks guys.