Questions by Amiram Stark

Questions by Amiram Stark

Evaluate: cos(2arctan(1/3)) I used the double angle identity cos(2x) = cos^2x-sin^2x cos(2x)= (3/sqrt(10))^2- (1/sqrt(10))^2 = 2/25 2/25 was my answer to this problem but the correct answer was 4/5 How

asked Aug 24, 2018

1 answer

5 votes

217k views

write an evaluation of how the effectiveness of the declaration as a speech compares to its effectiveness as a written document.

asked Jan 24, 2018

1 answer

0 votes

162k views

What effect did the system of manorialism have on people in medieval Europe?

asked Apr 26, 2017

1 answer

3 votes

91.7k views

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