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How do I show that cos(z1 + z2) = cos(z1)cos(z2)  sin(z1)sin(z2)
 Similar Discussions: How do I show that cos(z1 + z2) = cos(z1)cos(z2)  sin(z1)sin(z2)

Optimize f(x,y,z) = x2 + y2 + z2  2x (Replies: 1)
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