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gri6anja20021
@gri6anja20021
July 2022
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ПОМОГИТЕ ПЛИИИЗ!!!
3.18
Дан треугольник QPR, ∢P=90°. Вычислите
A) PQ, если QR=27 см, ∢R=60°
B) PR, если PQ=8.4 см, ∢Q=30
C) QR, если PR=10 см, ∢R=45°
D) cos R, если QR=17 см, PR=8 см
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Answers & Comments
sj2017
А) sin60=1/2*sqrt(3)=pq/27
pq=27*1/2*sqrt(3)
б) PR=8.4/2=4.2
c) 1/sqrt(2)=10/qr
qr=sqrt(2)*10
d) cosR=8/17
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Answers & Comments
pq=27*1/2*sqrt(3)
б) PR=8.4/2=4.2
c) 1/sqrt(2)=10/qr
qr=sqrt(2)*10
d) cosR=8/17