Question

2tanx + 2= 0

Answer 1

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Answer 2

assuming you want to solve for x, it simplifies to 2tanx =-2 , which equals tan x = -1.

Answer 3

Subtract 2 from both the sides first..

Answer 4

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Answer 5

tanx= -1 isn't that -45?

Answer 6

Any doubt?

Answer 7

tan(-45) = -tan(45) = -1

Answer 8

how about in the interval 0 less than or equal to x which is less than or equal to 360

Answer 9

For that you have to go with general solutions..

Answer 10

Do check this link for more information on General Solutions of Trigonometric Equations:

http://openstudy.com/updates/5018d167e4b04dfc808c85e1