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Home / Doubts and Solutions/JEE/Mathematics

kindly solve (ref. 000)

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Asked by arup.isro 12th July 2018, 10:08 PM
Answered by Expert
Answer:
begin mathsize 16px style let space straight x space equals 4 space sin space 9 space cos space straight x space cross times straight t subscript 1 equals 4 space sin space 9 space cos space cross times 4 space sin space 63 space cos space 63........ open parentheses sin space 2 straight a space equals space 2 space sina space cos space straight a close parentheses equals 2 space sin space 18 space cross times space 2 space sin space 126 equals 4 sin space 18 space cross times space sin space open parentheses 180 minus 54 close parentheses equals fraction numerator cos space 18 over denominator cos space 18 end fraction cross times 2 sin space 18 space cross times space sin space 54 equals fraction numerator 2 space sin space 18 cross times space sin space 18 space cross times space sin space 54 over denominator cos space 18 end fraction equals fraction numerator 2 space sin space 36 space cross times space sin space 54 space over denominator cos space 18 end fraction equals fraction numerator cos space left parenthesis 54 space minus 36 right parenthesis space minus space cos space left parenthesis 54 plus 36 right parenthesis space over denominator cos space 18 end fraction equals fraction numerator cos space 18 space minus space cos space 90 over denominator cos space 18 end fraction equals 1 straight x space cross times straight t subscript 1 equals space 1 straight x equals 1 over straight t subscript 1 log subscript straight t subscript 1 end subscript straight x equals log subscript straight t subscript 1 end subscript open parentheses 1 over straight t subscript 1 close parentheses equals log subscript straight t subscript 1 end subscript open parentheses straight t subscript 1 close parentheses to the power of negative 1 end exponent equals negative 1 end style
Answered by Expert 16th July 2018, 2:34 PM
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