find the angle

• Jul 28th 2007, 01:36 PM
harry
find the angle
find the acute angle A to the nearest seond when
(a) sinA= 0.30985 (b) cotA=0.52613 (c) tan A=0.13476
• Jul 28th 2007, 02:50 PM
galactus
Are you allowed to use calculator?. Are you expected to do these manually for some silly reason?.

If you are expected to do these by hand these days, it's silly. Why don't we just revert to slide rules. No one does that in the real world.

$sin^{-1}(0.30985)=$

$cotA\Rightarrow{A=tan^{-1}(\frac{1}{0.52613})}$

etc.