Verify the identity.sin 4x = 2 sin 2x cos 2x
What will be an ideal response?
sin 4x = sin [2(2x)] = 2 sin 2x cos 2x.
Mathematics
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Find all the second order partial derivatives of the given function.f(x, y) = x2 + y - ex+y
A. fxx(x, y) = 2 - ex+y; fyy(x, y) = - ex+y; fyx(x, y) = fxy(x, y) = -ex+y B. fxx(x, y) = 2 + ex+y; fyy(x, y) = ex+y; fyx(x, y) = fxy(x, y) = ex+y C. fxx(x, y) = 2 - y2ex+y; fyy(x, y) = -x2ex+y; fyx(x, y) = fxy(x, y) = - y2ex+y D. fxx(x, y) = 1 - ex+y; fyy(x, y) = - ex+y; fyx(x, y) = fxy(x, y) = -ex+y
Mathematics
Find all solutions by factoring.17x2 - 5x = 0
A. 
, 0
B. 
, 0
C. - 
, 0
D. - 
, 0
Mathematics
Solve the equation.
x - 
x = 2
A. 30 B. -60 C. -30 D. 60
Mathematics
Factor the expression completely.r2n - s2n
A. (rn - sn)(rn - sn) B. (rn - sn)(rn + sn) C. n(r - s)(r + s) D. (r2 - s2)(rn + sn)
Mathematics