Question

Will Medal and Fan
cos^−1 1, is the answer 1?

Answer 1

no 0 is the correct answer
cos^-1 (1) = 0
because at 0 angle cos 0 = 1

Answer 2

What about if it was sin^-1 0?

Answer 3

it will also zero because at 0 angle sin will also zero
while cos 0 =1

Answer 4

Can you put what you did into steps so I can understand it better

Answer 5

at 0 angle
sin 0 = 0
while cos 0 =1
but sin^-1 (0) = 0
cos^-1 (1)= 0

Answer 6

The first one I showed you is a separate problem from the second one