Answer:
We have, sinx+sin3x+sin5x=0
∴(sinx+sin5x)+sin3x=0
∴2sin(
2
x+5x
)cos(
5x−x
)+sin3x=0
∴2sin3xcos2x+sin3x=0
∴sin3x(2cos2x+1)=0
Either sin3x=0 or 2cos2x+1=0
i.e. sin3x=0 or cos2x=−
1
Now, cos2x=−cos
3
π
∴cos2x=cos(π−
)
∴cos2x=cos
2π
∴sin3x=0 or cos2x=cos
3x=nπ,n∈Z or 2x=2mπ±
where m∈Z
Hence, x=
nπ
or x=mπ±
, where n,m∈Z.
2ft
Step-by-step explanation:
5 x 10=50
7 x 12= 84
5+2=7 and 10+2=12
Please refer the pictures below-
Hence the area of the road is 9600m2
12f-5f²+6f+10f²= 10f²-5f²+12f+6f=5f²+18f
The answer would be .37, or 37%. 100 - 63 = 37.
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