zadanie w załączniku
funkcje trygonometryczne dla kątów 30, 45, i 60 stopni.
plisss!!
dam naj.!!
a) x/ ctg 30 = cos 30/ 2 sin 30
2 sin 30 * x = ctg 30 * cos 30
2 * 1/2x = √3 * √3/2
x = 3/2
x = 1 1/2
b) 5tg45/ √2x = sin45 / cos45
5tg45 * cos45= √2x * sin45
5 * 1 * √2/2 = √2 * √2/2 * x
5√2/2 = x
c) x/tg60 = cos60/sin60
sin60x= tg60 * cos60
√3/2x=√3 * 1/2
√3/2x = √3/2 |*2
√3x=√3 | :√3
x=1
d) x/ctg30 = cos60/sin45
sin45x = ctg30 * cos60
√2/2x = √3 *1/2
√2/2x = √3/2 |*√2
2x=√6
x=√6/2
e) cos30/sin30 = √3x / 2ctg30
cos30 * 2ctg30 = sin30 * √3x
√3/2 * 2 * √3 = 1/2 * √3x
3=√3/2x |*2
6=√3x
6√3=3x
x=2√3
f) sin45/x = 1/2ctg30 / 3/4cos60
1/2ctg30x = sin45 * 3/4 cos60
1/2 * √3x= √2/2 * 3/4 * 1/2
√3/2x = 3√2/16
(po wymnożeniu)
x = 2√6/16
x= √6/8
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a) x/ ctg 30 = cos 30/ 2 sin 30
2 sin 30 * x = ctg 30 * cos 30
2 * 1/2x = √3 * √3/2
x = 3/2
x = 1 1/2
b) 5tg45/ √2x = sin45 / cos45
5tg45 * cos45= √2x * sin45
5 * 1 * √2/2 = √2 * √2/2 * x
5√2/2 = x
c) x/tg60 = cos60/sin60
sin60x= tg60 * cos60
√3/2x=√3 * 1/2
√3/2x = √3/2 |*2
√3x=√3 | :√3
x=1
d) x/ctg30 = cos60/sin45
sin45x = ctg30 * cos60
√2/2x = √3 *1/2
√2/2x = √3/2 |*√2
2x=√6
x=√6/2
e) cos30/sin30 = √3x / 2ctg30
cos30 * 2ctg30 = sin30 * √3x
√3/2 * 2 * √3 = 1/2 * √3x
3=√3/2x |*2
6=√3x
6√3=3x
x=2√3
f) sin45/x = 1/2ctg30 / 3/4cos60
1/2ctg30x = sin45 * 3/4 cos60
1/2 * √3x= √2/2 * 3/4 * 1/2
√3/2x = 3√2/16
(po wymnożeniu)
x = 2√6/16
x= √6/8