can someone check the first one and help me with the last two

Question

find the values of s in the interval [0,pi/2] that make the statements true.
1. sin s = 0.75438373
i got 0.8547148
2. cos s = 0.74241049
is it .83666126??
3. cot s = 5.6394377
:)

Answer 1

1. yes (with s in radians)
2. no. The answer is 0.734135 radians
3. tan s = 0.1773226
s = 0.1754984

Answer 2

thankyou very very much:)

Answer 3

can you please help me on one of my other questions too...