<PRE><B>Question 871872</B>
if tan(beta) is undefined and sin(beta)&lt;0, then beta is? the answer is 270 degrees i am not sure what formula to use. 
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I don&#39;t think they want you to use a formula.
They are testing your knowledge of the function values.
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Since tan = y/x, tan is undefined when x is zero.
That occurs when b is 90  or b is 270.
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Sin is negative in QIII and QIV.
So the answer is 270
Cheers,
Stan H.
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