i^(-39)" of "pi17" e "

" The exact value of the expression "cos(12 pi/17)+cos(14 pi/17)+2cos(4 pi/17)cos(pi/17)" is "

Suppose E_1, E_2 and E_3 be three mutually exclusive events such that P(E_i)=p_i" for "i=1, 2, 3 . P(E_1capoverline(E_2))+P(E_2capoverline(E_3))+P(E_3capoverline(E_1)) equals

If e^(i theta)=cos theta+i sin theta, find the value of |1e^(i pi/3)e^(i pi/4)e^(-i pi/3)1e^(i2 pi/3)e^(-i pi/4)e^(-i2 pi/3)1|

Find the value of (cos .pi/7 cos . pi/17 - sin .pi/7 sin . pi/17)

The expression 2"cos"(pi)/(17)*"cos"(9pi)/(17)+"cos"(7pi)/(17)+"cos"(9pi)/(17) simplifies to an integer P. Find the value of P.

The expression 2"cos"(pi)/(17)*"cos"(9pi)/(17)+"cos"(7pi)/(17)+"cos"(9pi)/(17) simplifies to an integer P. Find the value of P.

Calculate the standard free energy change in kJ for the reaction Cu^(+) +I^(-) to CuI Given: CuI + e to Cu+I^(-) E^(0)=-0.17V Cu^(+)+e to Cu E^(0)=0.53V

Calculate the standard free energy change in kJ for the reaction Cu^(+) +I^(-) to CuI Given: 'CuI + e to 'Cu+I^(-)" "E^(0)=-0.17V Cu^(+)+e to Cu" "E^(0)=0.53V