y=7(sin2/3x+15pai/2)的奇偶性

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y=7(sin2/3x+15pai/2)的奇偶性y=7(sin2/3x+15pai/2)的奇偶性y=7(sin2/3x+15pai/2)的奇偶性y=7sin(2/3x+15π/2)=7sin(2/3x

y=7(sin2/3x+15pai/2)的奇偶性
y=7(sin2/3x+15pai/2)的奇偶性

y=7(sin2/3x+15pai/2)的奇偶性
y=7sin(2/3x+15π/2)
=7sin(2/3x+8π-π/2)……以下利用诱导公式变形
=7sin(2/3x -π/2)
=-7 sin (π/2-sin2/3x)
=-7cos 2/3x
显然该函数是偶函数.