Question 1188571
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<pre>

I ask my calculator about arctan(-0.4663) in degrees.

It gives me the value of -25°.


It is the angle in QIV, equivalent to -25+360 = 360-25 = 335 degrees.


Another angle with this value of tan is in QII;  it is  -25° + 180° = 155°.


So, the two angles for this part of the problem are  155° in QII and  335° in QIV.
</pre>

So, the first part is solved and completed.



Can you make the second part in a similar way ?


You may report me about your progress and/or your final answer.



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<U>Comment from student</U> : &nbsp;for the cos θ= -0.3420 , &nbsp;the angles are &nbsp;110 &nbsp;and &nbsp;250, &nbsp;is that correct?



<U>My response</U> : &nbsp;&nbsp;It is correct.


&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Good job !  &nbsp;&nbsp;My congratulations !