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CBSE Class 11-science Answered

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Asked by Imotheph1504 | 19 Dec, 2022, 08:19: PM
answered-by-expert Expert Answer
begin mathsize 14px style fraction numerator 1 space minus space i space sin alpha over denominator 1 space plus space 2 space i space sin alpha end fraction space equals space fraction numerator 1 space minus space i space sin alpha over denominator 1 space plus space 2 space i space sin alpha end fraction space cross times fraction numerator 1 space minus space 2 space i space sin alpha over denominator 1 space minus space 2 space i space sin alpha end fraction end style
 
begin mathsize 14px style R H S space equals space fraction numerator 1 space minus 3 space i space sin alpha space minus space 2 space sin squared alpha over denominator 1 space plus 4 space sin squared alpha end fraction space equals space fraction numerator 1 space space minus space 2 space sin squared alpha over denominator 1 space plus 4 space sin squared alpha end fraction space minus space i space fraction numerator 3 space sin alpha over denominator 1 space plus 4 space sin squared alpha end fraction end style
 
If RHS is only real , then imaginary part of RHS is zero .
 
Hence   begin mathsize 14px style alpha space equals space n pi end style , where n = 0,1,2,3...... etc
Answered by Thiyagarajan K | 20 Dec, 2022, 03:36: PM
CBSE 11-science - Maths
Asked by khairulmasud380 | 08 Feb, 2024, 12:22: AM
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CBSE 11-science - Maths
Asked by moulya123 | 08 Jan, 2024, 06:18: AM
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CBSE 11-science - Maths
Asked by saanvichawla2007 | 02 Oct, 2023, 12:10: AM
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CBSE 11-science - Maths
Asked by Imotheph1504 | 19 Dec, 2022, 08:19: PM
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CBSE 11-science - Maths
Asked by simrangurdasani05 | 17 Jul, 2022, 03:39: AM
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CBSE 11-science - Maths
Asked by yogineepawar2002 | 19 Apr, 2021, 10:09: AM
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CBSE 11-science - Maths
Asked by gurjarg3619 | 22 Mar, 2021, 10:55: AM
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