已知f(x)=asinx+btanx+1,满足f(5)=7,则f(-5)=?

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已知f(x)=asinx+btanx+1,满足f(5)=7,则f(-5)=?

已知f(x)=asinx+btanx+1,满足f(5)=7,则f(-5)=?
已知f(x)=asinx+btanx+1,满足f(5)=7,则f(-5)=?

已知f(x)=asinx+btanx+1,满足f(5)=7,则f(-5)=?
f(5)=asin5+btan5+1=7
asin5+btan5=6
f(-5)=asin(-5)+btan(-5)+1
=-asin5-btan5+1
=-(asin5+btan5)+1
=-6+1
=-5

f(5)=asin5+btan5+1=7
所以asin5+btan5=6
f(-5)=asin(-5)+btan(-5)+1=-asin5-btan5+1=-(asin5+btan5)+1=-6+1=-5