In triangle ABC, angle C is 90 degrees, AB = 8, BC = 2. Find the sine alpha.

The triangle is rectangular.

sin a is the ratio of the opposite leg to the hypotenuse.

BC – the opposite leg, in relation to the angle A.

AB – hypotenuse.

AB = 8;

BC = 2;

Substitute the known values, and find the sine of angle B.

sin B = BC / AB = 2/8 = 1/4 = 0.25.

Answer: sin B = 0.25.

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