Is there a formula for this?

Geometry Level 3

sin⁡−1(sin⁡10∘+sin⁡50∘)\large \sin^{-1} (\sin 10^{\circ} + \sin 50^{\circ})

What is the value of the above expression in degrees?

The answer must be between -90 and 90.

Sharky Kesa by Sharky Kesa
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