find the value of cos^2A+cos^4A.
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Hope it helps you ...
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heya folk !!!
it is so easy.....☺
sin@+sin^2@=1. (given)----------1)
=)sin@=1-sin^2@
=)sin@=cos^2@------------2)
if we squaring on both side
similarly ,. sin^2@=cos^4@ ( we can right )---------3)
now putting on (1)
sin@+sin^2@=1
from (2) and (3)
cos^2@+cos^4@=1 so here prooved.
hope it help you.☺
@rajukumar☺☺
it is so easy.....☺
sin@+sin^2@=1. (given)----------1)
=)sin@=1-sin^2@
=)sin@=cos^2@------------2)
if we squaring on both side
similarly ,. sin^2@=cos^4@ ( we can right )---------3)
now putting on (1)
sin@+sin^2@=1
from (2) and (3)
cos^2@+cos^4@=1 so here prooved.
hope it help you.☺
@rajukumar☺☺
thanks
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