hello I can't success to solve this 2^(1/2)cos(x+(pi/6))=-1 I use parametric form but I can't success how i must do?

Question

hello I can't success to solve this 2^(1/2)cos(x+(pi/6))>=-1 I use parametric form but I can't success how i must do?

anonymous · Answer

$$2^{1/2}\cos (x+\pi/6)\ge-1$$
is this the inequation??

anonymous · Answer

yes!

anonymous · Answer

http://www.wolframalpha.com/input/?i=2%5E%281%2F2%29cos%28x%2B%28pi%2F6%29%29%3E%3D-1

anonymous · Answer

well, do u need general solution or solution between -pi to pi???

anonymous · Answer

i tried with that site but it give me only the solution I need to know how to solve this inequation

anonymous · Answer

oo.. sry i'm not good in trigonometry inequalities

anonymous · Answer

xd this is the same problem for me :p do you know somebody that could help me with this?

anonymous · Answer

http://www.youtube.com/watch?v=h--b_b5gW_0 try to watch...

anonymous · Answer

actually if what i want to know step by step i search youtube...

anonymous · Answer

I know how solve it but the problem it's that doesn't work

anonymous · Answer

solution are : ]-pi/12+2kpi, 7pi/12+2kpi[

anonymous · Answer

problem is how i can get this

anonymous · Answer

.. sry.. i dont know who else can solve.. but i know 1 person... isn't online now.. satelite.... 100 lvl in math.. always online in 8-11pm (GMT+8 malaysia time zone)

anonymous · Answer

sorry, i gave the wrong answer at first

anonymous · Answer

thanks for your advice neoh147 arnab09 you can't help me?

anonymous · Answer

i can.. i guess... but gotta take more time :(

anonymous · Answer

ok so advice me only how i can solve it for example say me if i must solve the cos addition? and then i must use parametric form?

anonymous · Answer

well, i am trying to solve drawing quadrants

anonymous · Answer

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