(iii) The difference between greatest and least number of
-5/9+2/9(-4)/9
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Answer:
i think it will be helpful for you
Step-by-step explanation:
∴f
′
(x)=0⇒2cos2x−1=0⇒cos2x=
2
1
⇒2x=
3
π
,−
3
π
⇒x=
6
π
,−
6
π
Now f(−
2
π
)=
2
π
,f(
2
π
)=−
2
π
f(−
6
π
)=−
2
3
+
6
π
,f(
6
π
)=
2
3
−
6
π
Clearly
2
3
−
6
π
is the greatest value of f(x)
and its least value is −
2
π
Hence the required difference is
2
3
−
6
π
−(−
2
π
)=
2
3
+
3
π
marks me as brilliant plz
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