Home Physics Vectors Basic Mathematics y = 5 cos –4 x, find
Physics Vectors Basic Mathematics MCQ (Single Correct)

y = 5 cos –4 x, find

A
20 sin x cos –5 x
B
10 sin x cos –5 x
C
20 sin x cos –3 x
D
20 sin x sin –5 x

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Text Solution

Verified by Experts
The correct answer is:
A

With u = cos x

Y = 5u –4

= ×

= 5 (–4) u –5 (– sin x)

= 20 sin x cos –5 x

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