摘要:=2+2sin(-2x+)=2-2sin(2x-)
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设f(x)=2sin(
-
)sin(π+
)+cos2(
-
)-cos2(π+
)
(1)若x∈(0,
),求f(x)的最小值;
(2)设g (x)=f(2x-
)+2m,x∈[
,
],若g (x)有两个零点,求实数m的取值范围.
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π |
2 |
x |
2 |
x |
2 |
π |
2 |
x |
2 |
x |
2 |
(1)若x∈(0,
π |
2 |
(2)设g (x)=f(2x-
π |
4 |
π |
4 |
7π |
8 |