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CBSE Class 11-science Answered

Pls solve
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Asked by pb_ckt | 11 Jun, 2019, 03:33: PM
answered-by-expert Expert Answer
let space straight theta equals straight a plus straight b given space that space space straight phi space equals straight a minus straight b also tan space straight a space equals space straight k space tan space straight b fraction numerator tan space straight a over denominator tan space straight b end fraction space equals space straight k by space componendo space and space dividendo fraction numerator tan space straight a space minus space tan space straight b over denominator tan space straight a space plus space tan space straight b end fraction equals fraction numerator straight k minus 1 over denominator straight k plus 1 end fraction fraction numerator begin display style fraction numerator sin space straight a over denominator cos space straight a end fraction end style minus begin display style fraction numerator sin space straight b over denominator cos space straight b end fraction end style over denominator fraction numerator sin space straight a over denominator cos space straight a end fraction plus fraction numerator sin space straight b over denominator cos space straight b end fraction end fraction equals fraction numerator straight k minus 1 over denominator straight k plus 1 end fraction fraction numerator begin display style sin space straight a space cos space straight b minus sin space straight b space cos space straight a end style over denominator sin space straight a space cos space straight b plus sin space straight b space cos space straight a end fraction equals fraction numerator straight k minus 1 over denominator straight k plus 1 end fraction fraction numerator begin display style sin space open parentheses straight a minus straight b close parentheses end style over denominator sin space left parenthesis straight a plus straight b right parenthesis end fraction equals fraction numerator straight k minus 1 over denominator straight k plus 1 end fraction fraction numerator begin display style sin space straight phi end style over denominator sin space straight theta end fraction equals fraction numerator straight k minus 1 over denominator straight k plus 1 end fraction
Answered by Arun | 13 Jun, 2019, 10:15: AM

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CBSE 11-science - Maths
clear this doubt
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Asked by mishraparveen1234 | 15 Jun, 2022, 04:56: PM
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CBSE 11-science - Maths
If A+B+C=pi , then equality of equation (1/2)(cosA cosB + cosB cosC + cosC cosA) must hold: a) <= 3/2.   b) >=(-3)   c) <=3/8   d) >=(-1)  
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CBSE 11-science - Maths
Q10
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Asked by omved0304 | 07 Aug, 2020, 11:24: AM
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CBSE 11-science - Maths
Solve question no-4
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Asked by richasingh0708.bmps | 23 Jun, 2020, 10:00: PM
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CBSE 11-science - Maths
If the value of cosec x repeats after an interval of 2straight pi,then what is the value of cosec(7straight pi/6)?
Asked by dppanigrahiadv | 26 May, 2020, 07:03: PM
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CBSE 11-science - Maths
Find the value of -cos(30)
Asked by lykanbeast04 | 21 May, 2020, 06:49: PM
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CBSE 11-science - Maths
Pls solve.
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Asked by pb_ckt | 12 Jun, 2019, 02:48: PM
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CBSE 11-science - Maths
Pls solve
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Asked by pb_ckt | 11 Jun, 2019, 03:33: PM
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CBSE 11-science - Maths
What is trigonometry  
Asked by Singhnitish1475 | 11 May, 2019, 01:46: AM
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CBSE 11-science - Maths
in a right angled triangle the hypotenuse is 2root2 times the perpendicular drawn from  the opposite vertex then then other acute angles of triangle are   
Asked by gargpuneet989 | 10 Jul, 2018, 06:28: PM
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