Question

У ΔABC ∠C=90°,AB=13см,BC=12см найти sin∠A

Answer 1

Ответ:

Пошаговое объяснение:

вывод с теоремы Пифагора sin∠A=ВС/АВ=12/13=0.92

Answer 2

To find sin∠A in triangle ΔABC, we can use the sine trigonometric ratio, which is defined as the ratio of the length of the side opposite the angle (in this case, side BC) to the hypotenuse (in this case, side AB) in a right-angled triangle.

The sine trigonometric ratio is given by:

sin∠A = Opposite / Hypotenuse

In this case, the opposite side to angle A is side BC, and the hypotenuse is side AB.

Given that AB = 13 cm and BC = 12 cm, we can calculate sin∠A as follows:

sin∠A = BC / AB sin∠A = 12 cm / 13 cm sin∠A ≈ 0.9231

So, sin∠A is approximately 0.9231.