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CBSE Class 10 Answered

Solve the question as soon as possible and  with proper steps.
 
 
Asked by sucharitasahoo1 | 22 Dec, 2017, 08:37: PM
answered-by-expert Expert Answer
begin mathsize 16px style straight l space sin space straight theta plus straight m space cos space straight theta space plus space straight n space equals space 0 straight l apostrophe space sin space straight theta plus straight m apostrophe space cos space straight theta space plus space straight n apostrophe equals 0 By space cross minus multiplication space method comma space we space have fraction numerator sin space straight theta over denominator mn apostrophe minus straight m apostrophe straight n end fraction equals fraction numerator cos space straight theta over denominator nl apostrophe minus straight n apostrophe straight l end fraction equals fraction numerator 1 over denominator lm apostrophe minus straight l apostrophe straight m end fraction rightwards double arrow sin space straight theta equals fraction numerator mn apostrophe minus straight m apostrophe straight n over denominator lm apostrophe minus straight l apostrophe straight m end fraction space and space cos space straight theta equals fraction numerator nl apostrophe minus straight n apostrophe straight l over denominator lm apostrophe minus straight l apostrophe straight m end fraction Now comma sin squared space straight theta plus cos squared space straight theta equals 1 rightwards double arrow open parentheses mn apostrophe minus straight m apostrophe straight n close parentheses squared over open parentheses lm apostrophe minus straight l apostrophe straight m close parentheses squared plus open parentheses nl apostrophe minus straight n apostrophe straight l close parentheses squared over open parentheses lm apostrophe minus straight l apostrophe straight m close parentheses squared equals 1 rightwards double arrow open parentheses mn apostrophe minus straight m apostrophe straight n close parentheses squared plus open parentheses nl apostrophe minus straight n apostrophe straight l close parentheses squared equals open parentheses lm apostrophe minus straight l apostrophe straight m close parentheses squared end style
Answered by Rashmi Khot | 22 Dec, 2017, 11:58: PM

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