1.

Find the value of cos^(2)1^(@)+cos^(2)2^(@)+cos^(2)3^(@)+ -----+cos^(2)87^(@)+cos^(2)88^(@)+cos^(2)89^(@)+cos^(2)90^(@)

Answer»

`44(1)/(2)`
44
`45(1)/(2)`
N.O.T.

Answer :A


Discussion

No Comment Found