Sec^2x+2sec=0. solve the equation for 0

Question

asked Dec 5, 2017 187k views

1 Answer

Rethunk · Answer 1 · 2017-12-09T12:41:31+0000

u = sec x ( substitution )
u² + 2 u = 0
u ( u + 2 ) = 0
u = 0, or u = - 2
1/cos x = 0 1/cos x = - 2
(not accepted ) cos x = -1/2
x 1 = 2π/3, x 2 = 4π/3

Sec^2x+2sec=0. solve the equation for 0

Please log in or register to add a comment.

Please log in or register to answer this question.

1 Answer

Please log in or register to add a comment.

Related questions

Categories

Other Questions