Any Humble soul? Just a small doubt. I swear.

[preetsingh]

<p><a href="http://apcentral.collegeboard.com/apc/public/repository/ap07_calculus_bc_form_b_q2.pdf%5B/url%5D"&gt;http://apcentral.collegeboard.com/apc/public/repository/ap07_calculus_bc_form_b_q2.pdf&lt;/a&gt;&lt;/p>

<p>In the first part,while calculating speed why have they chosen the radian mode to calculate arctan(t/1+t)
How does one differentiate question to question?
I got it all wrong cause I had it in degree mode :(</p>

[risubu]

<p>Calculus is all radians. There are no degrees. Degrees are not used for anything at all in calculus.</p>

<p>Yes, it is unfortunate. That’s why I memorized all the trig functions with radian values.</p>