Determine all the possible value of x where 0 deg <= x <= 360 deg.

Apr 2013
13
0
Korea
How to solve this question?

cos x cos 200 + sin x sin 200 = square root 3/2.
 
Dec 2011
2,314
916
St. Augustine, FL.
Hint: Consider using the angle sum/difference identity for cosine...
 
Feb 2013
445
89
Saudi Arabia
COS(x-20)=square root 3/2

then easy...
 
Dec 2011
2,314
916
St. Augustine, FL.
COS(x-20)=square root 3/2

then easy...
You have robbed the OP of the chance to find that on their own...it is good forum etiquette NOT to come along behind someone who has offered a suggestion and essentially solve the problem.
 
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