If y = sin 4x and 1 cos4 dy x
dx A = , then the value of
A is
(1) 4
(2) 1
/4
(3) Zero
(4) 3
Answers
Answered by
1
Answer:
ANSWER
We have 4sin
4
x+cos
4
x=1
⇒4sin
4
x=1−cos
4
x=(1−cos
2
x)(1+cos
2
x)=sin
2
x(2−sin
2
x)
⇒sin
2
x[5sin
2
x−2]=0
⇒sinx=0 or sinx=±
5
2
⇒x=nπ or x=nπ±sin
−1
5
2
,(n∈Z)
Answered by
1
Answer:
2,.1 ...... ...... .....
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