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IfI1=int0^(pi/2)f(sinx)sinxdx and I2=int...

If`I_1=int_0^(pi/2)f(sinx)sinxdx` and `I_2=int_0^(pi/2)f(cosx)cosxdx`then`I_1/I_2`

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`3x-7y^2+3xyz=3(2)-7(-4)^2+3(2)(-4)(1)`
`=6-7xx16-6xx4`
`=6-112-24`
`=6-136`
`=130`
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