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CBSE Class 11-science Answered

prove that in a triangle Sin(sq.) B –Sin(sq.)C = sin(B+C) Sin(B-C) (sq. - square)
Asked by Rida Mukadam | 29 May, 2015, 06:30: PM
answered-by-expert Expert Answer
R. H. S. equals sin open parentheses B plus C close parentheses sin open parentheses B minus C close parentheses equals open parentheses sin B cos C plus cos B sin C close parentheses open parentheses sin B cos C minus cos B sin C close parentheses equals open parentheses sin squared B cos squared C minus cos squared B sin squared C close parentheses equals sin squared B open parentheses 1 minus sin squared C close parentheses minus open parentheses 1 minus sin squared B close parentheses sin squared C equals sin squared B minus sin squared B sin squared C minus sin squared C plus sin squared B sin squared C equals sin squared B minus sin squared C equals L. H. S. H e n c e comma space p r o v e d.
Answered by satyajit samal | 30 May, 2015, 11:31: PM

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CBSE 11-science - Maths
Please someone solve No. 15.iii)
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Asked by jiujam | 06 Jul, 2019, 03:34: PM
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CBSE 11-science - Maths
The equation sinx(sinx+cosx)=k has real solutions if and only if k is a real number such that_____________?  
Asked by aahnik.mohanty | 22 May, 2019, 10:09: PM
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CBSE 11-science - Maths
If f(x)=2(7cosx+24sinx)(7sinx-24cosx), then find the maximum value of (f(x))^1/4
Asked by aahnik.mohanty | 22 May, 2019, 09:59: PM
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CBSE 11-science - Maths
Cot 4x (sin5x + sin3x)= cot x (sin5x - sin3x)
Asked by Iamanish2003 | 20 May, 2019, 02:12: PM
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CBSE 11-science - Maths
In ∆ABC, If r1=8, r2=12, r3=24,Show that a=12,b=16,c=20. (From 
Asked by Soma | 04 Mar, 2019, 11:18: PM
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CBSE 11-science - Maths
Which of the following is the correct option?
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Asked by dineshchem108 | 03 Sep, 2018, 09:03: AM
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CBSE 11-science - Maths
If acos θ = bcos (θ+120°) = c cos (θ+240°) , then find the value of 1/a+1/b+1/c
Asked by tps.mjmdr | 16 Jun, 2018, 05:45: PM
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CBSE 11-science - Maths
If 13θ= π , find the value of 3θ+cos5θ + 2cosθcos9θ
Asked by tps.mjmdr | 16 Jun, 2018, 05:40: PM
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CBSE 11-science - Maths
Prove that,
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
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CBSE 11-science - Maths
If  find the value of
Asked by Topperlearning User | 31 Aug, 2016, 06:47: PM
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