Question

If sin theta=1/2, what could not be the value of theta?

Answer 1

a. 30 degrees
b. 210 degrees
c. 150 degrees
d. 390 degrees

Answer 2

Do you have the unit circle with you?

Answer 3

@aliloo

Answer 4

Yes I've got it

Answer 5

(cos, sin)
See where the angle of sine is 1/2 and see where the degrees it's located at.

Answer 6

Did you see where sin is 1/2 ?

Answer 7

At the unit circle

Answer 8

150 degrees?

Answer 9

Yes

Answer 10

150 degrees is not the only one. Are there any more?

Answer 11

30, 60, 300

Answer 12

well, 60 degrees and 300 degrees has a cosine=1/2, not sine

Answer 13

Oh okay

Answer 14

so 30 and 150?