cos²180/16+cos²1260/16+cos²900/16+cos²900/16
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cos^2 180/16+cos^2(90-180/16)+cos^2(900/16)+cos(90-900/16)
=cos^2(180/16)+sin^2(180/16)+cos^2(900/16)+sin^2(900/16)
=1+1
=2
vik2kumar12:
galt hai
second bhag jlt h
oops ak min
answer malum ni
mujhe
sahi h mere bhai
kyuki cos(90-@)=sin@ or sin(90-@)=cos@
achha se dekho bhai
glt h
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