4x-28x-32=0
-24x-32=0
24x=-32
x=-4/3=-1 1/3
Tgα = 1 / ctgα
ctgα=7/8 tgα= 8/7
13sinα+14cosα 13 13tgα 14ctgα 14 13+14ctgα 13tgα+14<span>
____________ = __ - _____ + ____ - ____ = _________ - ________ =</span><span>
15sinα-16cosα 15 16 15 16 15 16
</span>
13+14*7/8 13*8/7+14
=_________ - ________ =
15 16
25,25 13*8/7+14
=_________ - ________ = 1,8+1,683 = 3.483
15 16
Уж извини, но по-другому не знаю как.
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