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2010-01-15T13:44:41+01:00
C) ctg60°=2√3/x
√3/3=2√3/x
√3x=6√3/:√3
x=6

cos60°=2√3/y
1/2=2√3/y
y=4√3

d)
ctg45°=2/x
1=2/x
x=2

cos45°=2/y
√2/2=2/y
y√2=4/√2
y=2√2

e)
sin30°=y/6√2
1/2=y/6√2
2y=6√2/2
y=3√2

cos30°=x/6√2
√3/2=x/6√2
2x=6√6/2
x=3√6

f)
sin45°=x/3
√2/2=x/3
2x=3√2/2
x=1,5√2

cos45°=y/3
√2/2=y/3
2y=3√2/2
y=1,5√2

g)
sin30°=y/1
1/2=y/1
2y=1
y=1/2

cos30°=x/1
√3/2=x/1
2x=√3/2
x=√3/2
2010-01-15T19:42:58+01:00
C) tg60=x/2√3
√3=x/2√3
x=6
cos60=2√3/y
1/2=2√3/y
y=4√3
d) tg45=x/2
1=x/2
x=2
cos45=2/y
√2/2=2/y
√2y=4
y=2√2
e)cos60=y/6√2
1/2=y/6√2
y=3√2
sin60=x/6√2
√3/2=x/6√2
2x=6√6
x=3√6
f)x=y
2x²=9
x²=9/2
x=3/√2
x=3√2/2
g)cos60=y/1
1/2=y
cos30=x/1
√3/2=x

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