Here's the question you clicked on:
mathaddict4471
lim x --> pi/3 for x (cos x)^2 the answer is zero but how would you solve it with out using a calculator?
divide all by 2 then multiplybypi sqaured
wait i think its 4 by using the unit circle whoops
what i did was pi/3 times cospi/3 squared with x equaling pi/3
Well, if it's the entire cosine squared, then you should see (cos pi/3)^2 = (1/2)^2 = 1/4. Then, multiplying by x = pi/3, is pi/12.