For what its worth:

sin 5 degrees = 0.0872

and similarly is:

Tan 5 degrees = 0.0875

The difference over 5 units is (0.0875 - 0.08720) = 0.0003 units over 5" length so the difference is minute (very small) and nothing to get hung up about.

A good scientific/mathematical calculator will do the conversion from decimal degrees to degrees:minutes:seconds - and reverse - with just one or perhaps two keystrokes.

The difference over either the sin or tan of an angle is very close to being linear over a distance 5 degrees

sin 5 degrees = 0.0872

and similarly is:

Tan 5 degrees = 0.0875

The difference over 5 units is (0.0875 - 0.08720) = 0.0003 units over 5" length so the difference is minute (very small) and nothing to get hung up about.

A good scientific/mathematical calculator will do the conversion from decimal degrees to degrees:minutes:seconds - and reverse - with just one or perhaps two keystrokes.

The difference over either the sin or tan of an angle is very close to being linear over a distance 5 degrees

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