if cos theta equal 1 by 2 then find value of Cos 4 theta
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cosA =1/2 =cos 60
cos 4A =cos 4×60=240
cos240 =0.325718
cos 4A =cos 4×60=240
cos240 =0.325718
sonalmishra:
mark it brainielist
miss if have to copy value of Cos 240 I can also copy try to solve using trigonometry
it cant with that
it can cos 240 can be written as cos(180+60) which is equal to - sin 60 then value of - sin 60 put ans will there
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7
I think this is the answer
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find the value of Cos 240 also
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