Trigonometry

Trigonometric Equations

0 ≤ x ≤ 2 π, solve the equation 4 sec x + 8=0

Question

Tiny

19 December, 10:40

+4

Answers (2)

Know the Answer?

Demarcus Cuevas · Answer 1

x = 2π/3, 4π/3

Step-by-step explanation:

4secx = - 8

secx = - 2

cosx = - ½

basic angle = π/3

x = π - π/3, π + π/3

x = 2π/3, 4π/3

Maddison Bridges · Answer 2

Step-by-step explanation:

4 sec x=-8

secx=-2

cos x=-1/2=-cos π/3=cos (π-π/3), cos (π+π/3)

=cos (2π/3), cos (4π/3)

x=2π/3,4π/3

TrigonometryTrigonometric Equations0 ≤ x ≤ 2 π, solve the equation 4 sec x + 8=0