integration of sinx dx a( upper limit π/3 and the lower limit π/6)
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Answer:
ans is √3-1/2
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I hope I helped you dear have a good day
Explanation:
sin2x=1−(sinx−cosx)2
∫(sinx+cosx)dx1−(sinx−cosx)2−−−−−−−−−−−−−−−√
Let,
sinx−cosx=t
dtdx=sinx+cosx
∫dt1−t2−−−−−√
=arcsint=arcsin(sinx−cosx)
Putting limits,
=arcsin3–√−12−arcsin1−3–√2
As a sidenote, I have always been taught to substitute
sin2x=1+(sinx+cosx)2
when there are (sinx−cosx) and sin2x in the same integral.
sin2x=(sinx−cosx)2−1
when there are (sinx+cosx) and sin2x in the same integral. Although exceptions may exist.
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