∫sin5xdx = _____?
- -1/5cos5x + c
- 1/5cos5x + c
- -1/5sin5x + c
- None of these
Explanation
Let u = 5x, du/dx = 5, du = 5dx, dx = du/5
∫sin5xdx = (1/5)∫sinu du
= (1/5)(-cosu) + c
= -1/5cos5x + c
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