Oblicz wartość wyrażenia:
b).-3cos + 6sin / 8 sin + 3 cos =
gdy ctg=-2
Proszę.
ctg=cos/sin
tg=sin/cos
(-3cos + 6sin)/(8sin +3 cos)= -3/8ctg+ 2tg= 3/4+ 2tg=3/4 + (-1)= -1/4
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ctg=cos/sin
tg=sin/cos
(-3cos + 6sin)/(8sin +3 cos)= -3/8ctg+ 2tg= 3/4+ 2tg=3/4 + (-1)= -1/4