Ответ:
Объяснение:
3) n=sin25/sin15=sin48/sinα
sinα=sin15*sin48/sin25=0.259*0.743/0.423=0.455
α=27°
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6) n=1.6
sinα/sinβ=n
β=90-α (по условию т.к. 180-90=α+β)
sinβ=sin(90-α)=cosα
sinα/cosα=tgα=n
α=arctg1.6=58°
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Ответ:
Объяснение:
3) n=sin25/sin15=sin48/sinα
sinα=sin15*sin48/sin25=0.259*0.743/0.423=0.455
α=27°
=======================
6) n=1.6
sinα/sinβ=n
β=90-α (по условию т.к. 180-90=α+β)
sinβ=sin(90-α)=cosα
sinα/cosα=tgα=n
α=arctg1.6=58°
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