`cos1^@.cos2^@.cos3^@............cos90^@=?`
`(a) 0`
`(b) 1`
`(c) -1`
`(d) sqrt2`

Find the value of cos1^(@).cos2^(@).cos3^(@).cos90^(@)

Let x=sin1^(0), then the value of the expression.(1)/(cos0^(0)cos1^(0))+(1)/(cos1^(0)cos2^(0))+(1)/(cos2^(0)cos3)+(1)/(cos44^(0)cos45^(@)) is equal to (a) x (b) (1)/(x) (c) (sqrt(2))/(x) (d) (x)/(sqrt(2))

cos(cos1)>(1)/(sqrt(2))

cos(cos1)>(1)/(sqrt(2))

The value of cos1^(0)cos2^(0)cos3^(0)cos179^(@) is 1/sqrt(2) b.0 c.1 d.-1

What is the value of "cos"1^(@)"cos"2^(@)"cos"3^(@)…"cos"90^(@) ?

cos 40^0+cos 80^0+cos 160^0+cos 240^0= 0 b. 1 c. 1//2 d. -1//2

cos^(-1) (cos (2 cot^(-1) (sqrt2 -1))) is equal to

Find the vaue of cos 1^@ cos 2^@ cos 3^@ ….cos 88^@ cos 89^@ cos 90^@

cos^(-1) ( cos( 2 cot^(-1)(sqrt2 - 1))) is equal to