SOLVED: Find zw and z/w. Write each answer in polar form and in exponential form. z=5(cos pi/11 + i sin pi/11) w=5(cos pi/12 + i sin pi/12) The product zw in polar
cos((2pi)/5)cos(pi/(15))+sin((2pi)/5)sin(pi/(15))
calcul Pi sur cinq
Trigonometry Angles--Pi/5 -- from Wolfram MathWorld
arccos(cos(-pi/5))
Prove that: cos(π/5) cos(2π/5) cos(4π/5) cos(8π/5) = -1/16 - Sarthaks eConnect | Largest Online Education Community