For the sake of interest only ..
I am trying to build an applicatin that will predict the position of the sun in the sky (horizontal and vertical angle) for any given date and geographical location for any of the planets in our solar system.
So far so good, but ...
The following sum, I am reliably informed, should equate to: 1.9142°
1.9148° * sin(87.1807°) + 0.0200° * sin(2 * 87.1807°) + 0.0003° * sin(3 * 87.1807°)
I am getting: -1.3721
I'm probably making a school boy error.
Any help would be welcome.