find the solutions of the equation which lie in [o,2pi] sec x= -2 ?

Question

find the solutions of the equation which lie in [o,2pi]  sec x= -2   ?

terenzreignz · Answer

Confused about the cosecant?
Maybe this will cheer you up :)
$$\huge \csc \ \theta=\frac1{\sin \ \theta}$$

anonymous · Answer

there is sec . made a mistake

anonymous · Answer

nothing for cheering me up i guess so far:)

terenzreignz · Answer

Okay... then maybe THIS will cheer you up :)
$$\huge \sec \ \theta=\frac1{\cos \ \theta}$$

anonymous · Answer

yeah but what will be reference angle ?

anonymous · Answer

cos x = -1\2

terenzreignz · Answer

^That's right :)
And there are only two values of x between 0 and 2pi where that's true :D

anonymous · Answer

cosx = cosy

x = n pie + - y

anonymous · Answer

yeah you right ! but can u write those values for me :P

anonymous · Answer

?

terenzreignz · Answer

anonymous · Answer

every body giving me links :D not solution of my question :(

terenzreignz · Answer

But, it's just a matter of looking at that unit circle and pinpointing the cases where cosine equals -1/2

anonymous · Answer

no usage of reference angle?

terenzreignz · Answer

The reference angles are marked out in the unit circle :)  In degrees and in radiance... for your convenience ;)

anonymous · Answer

woooo thx got that i just starting to love trignometary :D

anonymous · Answer

*trigonometry

terenzreignz · Answer

Awesome :)