Feeling Cos90

Why is it that they measure the angle on the other side instead of the one between the needle and the magnet's axis.
Cos@ just seems...more reasonable, than Sin@.
I like to measure it that way. Angle between needle and magnet and use Cos@.

They instructed us to measure in three stages today. 0 to 45 to 90 degrees.
When they met, everything's just concluded by Cos0. It's zero distance too.

Pulling the magnet away, the needle moved from 0 towards 45...like most of you would know (:
Three times we measured it. Three.
Once at cos0...1
Once at cos45...0.7071
It became predictable everytime. and maybe disappointing...
Then needle reached its furthest. Cos90.
I didn't like to see it happen. Cos90. But the magnet was just pulled further away. And the compass needle just remained at Cos90.

Cos90 equals zero.
1, 0.7071, 0.
Further it goes, further the value lessens.

But look at it the other way. Tan90 for the magnet.
Even though they say tan90 is undefined, but I'd say it is just reaching towards its limit, towards its goal la (:

Because of that Cos90, there is the Tan90

Tan90 I love