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BB_2021
HSC - উচ্চতর গণিত ১ম পত্র
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অধ্যায়-১০ঃ যোগজীকরণ
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f
(
x
)
=
sin
x
f(x)=\sin x
f
(
x
)
=
sin
x
ক.
d
d
x
{
ln
1
−
cos
x
1
+
cos
x
}
\frac{d}{d x}\left\{\ln \sqrt{\frac{1-\cos x}{1+\cos x}}\right\}
d
x
d
{
ln
1
+
c
o
s
x
1
−
c
o
s
x
}
নির্ণয় কর ।
খ.
∫
d
θ
1
+
3
{
f
(
π
2
−
θ
)
}
2
\int \frac{d \theta}{1+3\left\{f\left(\frac{\pi}{2}-\theta\right)\right\}^{2}}
∫
1
+
3
{
f
(
2
π
−
θ
)
}
2
d
θ
নির্ণয় কর ।
গ. দেখাও যে,
∫
0
π
2
{
1
+
f
(
π
2
−
x
)
}
2
f
(
x
)
d
x
=
7
3
\int_{0}^{\frac{\pi}{2}}\left\{1+f\left(\frac{\pi}{2}-x\right)\right\}^{2} f(\mathrm{x}) \mathrm{dx}=\frac{7}{3}
∫
0
2
π
{
1
+
f
(
2
π
−
x
)
}
2
f
(
x
)
dx
=
3
7
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