plz solve the questions 18?? as well as 19?? given below

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plz solve the questions 18?? as well as 19?? given below

Asked by sarveshvibrantacademy | 22 Mar, 2019, 10:25: AM

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As per our policy only one question is going to answer in one url

Solution of question 19 is attached. Option b is corr

y subscript 1 space equals 5 sin left parenthesis omega t minus k x right parenthesis y subscript 2 space equals space minus 5 cos left parenthesis omega t minus k x minus 150 right parenthesis space equals space minus 5 cos left parenthesis omega t minus k x minus 90 minus 60 right parenthesis space equals space 5 sin left parenthesis omega t minus k x minus 60 right parenthesis s o space y subscript 2 space equals space 5 sin left parenthesis omega t minus k x minus 60 right parenthesis f o r m space t h e s e space t w o space w a v e space e q u a t i o n space w e space c a n space s e e space p h a s e space d i f f e r e n c e space b e t w e e n space t h e s e space t w o space w a v e space i s space 60 degree ϕ space equals space 60 degree a s space w e space k n o w A subscript r e s end subscript space equals space square root of A subscript 1 squared plus A squared subscript 2 plus 2 A subscript 1 A subscript 2 cos ϕ end root p u t t i n g space a l l space t h e space v a l u e s space w e space g e t A subscript r e s end subscript space equals square root of 5 squared plus 5 squared plus 2 cross times 5 cross times 5 cross times cos 60 end root A subscript r e s end subscript space equals space square root of 25 plus 25 plus 25 space end root space equals space square root of 75 equals space 5 square root of 3

Answered by Ankit K | 23 Mar, 2019, 20:27: PM

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