кутА = 90-40 = 50
a = sin50 * 15 ≈ 11,5
b = [tex]\sqrt{15^{2} - 11,5^{2} }[/tex]≈ 9,6
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кутА = 90-40 = 50
a = sin50 * 15 ≈ 11,5
b = [tex]\sqrt{15^{2} - 11,5^{2} }[/tex]≈ 9,6