Can you please explain Test 3 Section 4 #23?
Yep! The key to getting this one is recognizing that when they tell you that , they’re telling you that
. That’s just a little trig fact you should keep in mind when you’re taking the SAT. It can be derived pretty easily—just picture any right triangle with acute angles measuring
and
:
Of course, since it’s a right triangle,
. And if you do your SOH-CAH-TOA, you’ll see that
and
.
Anyway, back to the question. Once we recognize that , the rest is just substitution.