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CBSE Class 11-science Answered

The question is attchad. Please   send step by step complete solution. Please do not send any Web link to this question because I am unable to conmnect the same and open the solution every time.
Asked by sudhanshubhushanroy | 14 Dec, 2017, 07:23: AM
answered-by-expert Expert Answer
begin mathsize 16px style cos space straight A equals fraction numerator sin space straight B over denominator 2 space sin space straight C end fraction rightwards double arrow fraction numerator straight b squared plus straight c squared minus straight a squared over denominator 2 bc end fraction equals fraction numerator straight b over denominator 2 straight c end fraction rightwards double arrow straight c cubed minus straight a squared straight c equals 0 rightwards double arrow straight a squared minus straight c squared equals 0 rightwards double arrow straight a equals straight c rightwards double arrow straight A equals straight C Then comma space cos space straight A equals fraction numerator sin space straight B over denominator 2 space sin space straight C end fraction rightwards double arrow cos space straight C cross times 2 sin space straight C equals sin space straight B rightwards double arrow sin space 2 straight C equals sin space straight B Hence comma space option space left parenthesis straight a right parenthesis space and space option space left parenthesis straight d right parenthesis space are space correct. end style
Answered by Rashmi Khot | 15 Dec, 2017, 02:04: PM

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CBSE 11-science - Maths
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