P=1/2absinalfa
4=1/2*3*2√2*sinalfa
4=3√2sinalfa
sinalfa=4/3√2*3√2/3√2
sinalfa=2√2/3
P = 4
sina = ?
a = 3
b = 2√2
P = 1/2 * a * b * sina ---- wzór na pole
podstawiamy:
4 = 1/2 * 3 * 2√2 * sina
4 = 3√2 * sina
sina = 4: 3√2
sina = 4/3√2
sina = 4√2 / (3 * 2)
sina = 4√2 / 6
sina = 2√2/3 ------- odpowiedź
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P=1/2absinalfa
4=1/2*3*2√2*sinalfa
4=3√2sinalfa
sinalfa=4/3√2*3√2/3√2
sinalfa=2√2/3
P = 4
sina = ?
a = 3
b = 2√2
P = 1/2 * a * b * sina ---- wzór na pole
podstawiamy:
4 = 1/2 * 3 * 2√2 * sina
4 = 3√2 * sina
sina = 4: 3√2
sina = 4/3√2
sina = 4√2 / (3 * 2)
sina = 4√2 / 6
sina = 2√2/3 ------- odpowiedź