<p>They use rcos(angle) and their answer key uses radians. They mix up answer choices (the answer key says A while its value is in answer choice B).</p>
<p>This is in the Barron’s Sat Subject Test Math Level 2 10th edition (Richard Ku, Howard Dodge).</p>
<p>Am I really seeing these errors? Or am I heavily over estimating my knowledge? Also what would a 720-740 equate on the real deal?</p>
<p>@ColumbianX, both are widely used. In higher level math, radians are more common.</p>
<p>Generally, if an angle doesn’t have the degree symbol, treat it as radians. For example, cos 1 and cos 1° would mean the cosine of 1 radian and the cosine of 1 degree, respectively.</p>
<p>My test scores were…
Barrons: 770, 800,800,790,800,800
CB: 800, 800
Real: 800
Shows how muchharder barron’s (especially its diagnostic was [ took diagnostic after reading the whole book]) was.
By the way, rspence is right. Unless specified with a degree sign, always use radians. And when you get to calc, always use radians. They rarely specify degrees. Especially if you see a small integer as an angle. It makes more sense to use radians.
I’d say your scores shows that you will at least get a 750 on the real test. Maybe higher. Just study a little more and an 800 is definately reachable.</p>
<p>I got an 800 in math 2 and I couldn’t even finish the Barron’s papers in time. I honestly found the Barrons book utterly useless. The questions asked in it are hardly the kind asked in the real paper.</p>