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kellyd kellyd
  • 04-09-2016
  • Mathematics
Answered

How do i solve Sec^2x+2secx=0

Verified Answer :

nobillionaireNobley
nobillionaireNobley nobillionaireNobley
  • 05-09-2016

Let sec x = a
sec^2 x + 2sec x = 0
=> a^2 + 2a = 0
=> a(a + 2) = 0
=> a = 0 or a + 2 = 0
a = -2
i.e. sec x = -2
1/cos x = -2
-2cos x = 1
cos x = -1/2
x = cos^(-1) (-1/2) = 2pi/3

Answer Link
lillianc8182
lillianc8182 lillianc8182
  • 10-10-2020

Answer:

a on edge2020

Step-by-step explanation:

took the test and got it right

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