Hi there my friend :)
Your answer is C. frequency
Hope this helps :)
-xxAnsxx-
Answer:
The solved problem is in the photo. Hope it helps.
Heat will be produced because of the friction from the tires
Well,
arctan is a bijection from R into (-pi/2 , pi/2)*and
pi is a period of tangent function:
so
as we have : tan(7pi/4) = tan(pi - pi/4) = - tan(pi/4)
we finally get :
<span>arctan(tan(7pi/4)) = artan(tan(- pi/4)) = - pi/4
</span>
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