Thread: Finding value of x

What is the value of x if 180 < x < 270. (less than OR equal to 270, greater than OR equal to 180) and sinx = 5cosx.

Ok, I graphed both of these and searched for point of intersection.. The answer is 4.515. I'm a bit confused. I thought that the limits would put the answer in quadrant 3. Why, then, is the solution positive x?

Originally Posted by benny92000

What is the value of x if 180 < x < 270. (less than OR equal to 270, greater than OR equal to 180) and sinx = 5cosx.

Ok, I graphed both of these and searched for point of intersection.. The answer is 4.515. I'm a bit confused. I thought that the limits would put the answer in quadrant 3. Why, then, is the solution positive x?

since



tangent is positive in quad III

btw ... your answer is correct, it's in radians