Question_7
If z = e 3x5y5, where x = cost and y = sint, then
,
1. 15x5y4e3x5y5 (-sint) + 15x4y5e3x5y5 (cost)
2. 15x4y5e3x5y5 (cost) + 15x5y4e3x5y5 (sint)
3. 15x4y5e3x5y5 (-sint) + 15x5y4e3x5y5 (cost)
4. 15x5y4e3x5y5 (cost) + 15x4y5e3x5y5 (sint)
Question_8
If z = ex6y5, where x = cost and y
,
1.5x yexy 5
2. 6x5y5
dz
=
dt
dz
= sint, then
dt
(-sint) + 6x5y5 ex6y5 (cost)
(cost) +5x6y4exбy5 (sint)
3.6x5y5 ex6y5 (-sint) + 5x6y4 ex6y5 (cost)
4.5x6y4exys (cost) + 6x5y5 ex6y5 (sint)
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