inverse functions: find arccos, arcsin, arctan of 0

[jonjon1324]

I dont get this!!! it says:

find arccos, arcsin, arctan of 0.

the back of the book says that arccos = pi/2, and arcsin and arctan = 0...WHY???

 

[tkhunny]

cos(0) = 1
cos(pi/2) = 0
sin(0) = 0
sin(pi/2) = 1

Look down the right side. Find the zeros and see from whence they come.

 

[stapel]

the back of the book says that arccos = pi/2, and arcsin and arctan = 0...WHY???

Are you familiar at all with sines, cosines, and tangents? Because (as demonstrated in the previous reply) the answer follows immediately from their properties! :wink:

Eliz.