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If x1= 8 sintheta and x2=6costheta then ...

If `x_1= 8 sintheta` and `x_2=6costheta` then a 'x_1+x_2 max=10 b 'x_1+x_2=10sintheta+37' c 'x_1*x_2=24sintheta' d) 'x_1/x_2 = 4*tantheta/3'

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