已知实数a,b均不为零,asinα+bcosαacosα-bsinα=tanβ,且β-α=π6,则ba等于( ) A.3 B.33 C.-3 D.-33
已知实数a,b均不为零,
=tanβ,且
β-α=,则
等于( )
A.
B.
C.
-D.
-
数学人气:592 ℃时间:2020-04-17 19:26:09
优质解答
由题意
β-α=则
β=α+两边求正切得到:
tanβ=tan(α+)=
==
=.
所以
=,
故答案为B.
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