Does anyone know how to solve the second half of this question?
1 answer:
Answer:
see explanation
Step-by-step explanation:
given
f'(x) = 12cos x - 4sin x, then
f'(
) = 12cos(
) - 4sin(
)
[ cos(
) = -cos(
), sin(
= - sin(
) ]
= -12cos(
) + 4sin(
)
= - 12 ×
+ 4 × 
= - 6 + 2
≈ - 2.536 ( 3 dec. places )
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