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# Need help with a calc question.?

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- Engr. RonaldLv 72 months ago
f(x) = 5cos(x) - 6sin(x)

F(x) = 5sin(x) - 6[- cos(x)]

F(x) = 5sin(x) + 6cos(x) + C

when F(0) = 6

6 = 5sin(0) + 6cos(0) + C

6 = 5(0) + 6(1) + C

6 = 6 + C

6 - 6 = C

C = 0

Therefore

F(x) = 5sin(x) + 6cos(x) answer//

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- 2 months ago
F(x) = 5 * sin(x) + 6 * cos(x) + C

F(0) = 6

6 = 5 * sin(0) + 6 * cos(0) + C

6 = 5 * 0 + 6 * 1 + C

6 = 6 + C

0 = C

F(x) = 5 * sin(x) + 6 * cos(x)

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