Pythagoras
Fill two sides of a right triangle; the third and the area come out.
Open a calculatorTrigonometry
The angle is converted to radians (π/180) and passed to the usual sine, cosine and tangent. Tangent is undefined when cosine is zero (90°, 270° and the rest of that family). This is a school sketch, not a CAS.
°
Sine
0.5
Cosine
0.866025
Tangent
0.57735
Radians
0.523599
Sine: 0.5
30° should give sin ½ and cos √3/2. A calculator rounding will not print the exact radicals.
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An educational estimate. Not medical, tax or credit advice.