By using the Euler's identity: ei(theta) = cos(theta) + i*(sin(theta)) Show that 1. cos(theta) = (1/2)(ei(theta) + e-i(theta)) 2. sin(theta) = (1/2i)(ei(theta) - e-i(theta)) 3. cos(A-B) = cos(A)cos(B) + sin(A)sin(B) 4. sin(A-B) = sin(A)cos(B) - cos(A)sin(B)
By using the Euler's identity: ei(theta) = cos(theta) + i*(sin(theta)) Show that 1. cos(theta) = (1/2)(ei(theta) + e-i(theta)) 2. sin(theta) = (1/2i)(ei(theta) - e-i(theta)) 3. cos(A-B) = cos(A)cos(B) + sin(A)sin(B) 4. sin(A-B) = sin(A)cos(B) - cos(A)sin(B)
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By using the Euler's identity:
ei(theta) = cos(theta) + i*(sin(theta))
Show that
1. cos(theta) = (1/2)(ei(theta) + e-i(theta))
2. sin(theta) = (1/2i)(ei(theta) - e-i(theta))
3. cos(A-B) = cos(A)cos(B) + sin(A)sin(B)
4. sin(A-B) = sin(A)cos(B) - cos(A)sin(B)
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