Question

cos (2 arc sin 1) =

a) 2 pi
b) 1
c) 0
d) - 1

Answer 1

\[
\cos( 2 \arcsin (1))=\cos\left (2 \frac \pi 2\right )=\cos(\pi)

\]

Answer 2

Can you finish it?

Answer 3

What is
\[
\cos(\pi)
\]

Answer 4

-1

Answer 5

Great

Answer 6

thank you very much

Answer 7

yw

Answer 8

how did you know it is cos 2 pi/2 ?

Answer 9

are there any tutorials or formulas that show it?

Answer 10

Which angle has sin=1?

Answer 11

Try using my site on
http://www.math.missouri.edu/escgi/mucgi-bin/munew.cgi?variable=trig

Answer 12

thank you