Question

Can someone help me with these trig functions?

Eval Cos^-1 (tan pi/4)

sqrt2/2
pi
0
pi/4

Eval Cot (arctan3/5)

3/4
4/3
4/5
5/3

Answer 1

tan(pi/4) means 1
then cos^-1(1) is nothing but 0
......:)

Answer 2

Wow thanks!

Answer 3

cotx = 1/tanx
then
cot(arctan(3/5)) =
5/3

Answer 4

So you just flip the fraction?

Answer 5

Yes its exactly correct....

Answer 6

Oh okay! That was simpler than it looked, thanks for the help.

Answer 7

arctan(x) is nothing but tan^-1(x)