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18-19 फरवरी 2019 ( in hindi )
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Shivam Mishra
i'm a Educator , I have Youtube Channel 11K + Subscriber i Teach Because it's my Passion || MP PSC Aspirants ||

Unacademy user
Sir in ncert the equation of waves are expressed as sine functions and here as cos function .I am getting confused which one to apply ?Plz help...
Udit Gupta
a year ago
be it a sine wave or a cos wave, both are sinusoidal functions. There is only a phase difference of 90 degrees. So correspondingly things change a little bit.. Its not as if the whole theory is turned upside down.. bas thoda sa change hai jo aap adjust kar sakte ho..
toh sir board exam mei koi bhi function use kar sakti hu ?
Udit Gupta
a year ago
yes but preferentially use ncert.. if you can explain whatever you have written, the examiner has to give marks
ok thank u sir...😁