Mathematics

If sin θ = -1/2 for 0 If sin θ = -1/2 for 0 o, the value of θ is A. 30o and 150o B. 150o and 210o C. 210o and 330o D. 150o and 330o Correct Answer: Option C Explanation sin θ = -1/2 = -0.5 θ = sin-1 (0.5) θ = 30o Since θ is negative θ = 180 + 30 = 210o θ = 360 – 30 = 330o ∴θ = 210o and 330o `, props: [‘comment’], data() { return {} }, methods: {} }) {{ reply.posted_by.display_name }}:   {{ reply.created_at }}

If sin θ = –1/2 for 0 o, the value of θ is
  • A.
    30o and 150o
  • B.
    150o and 210o
  • C.
    210o and 330o
  • D.
    150o and 330o
Correct Answer: Option C
Explanation

sin θ = –1/2
= -0.5
θ = sin-1 (0.5)
θ = 30o
Since θ is negative
θ = 180 + 30 = 210o
θ = 360 – 30 = 330o
∴θ = 210o and 330o