calculate :

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- January 11th 2014, 04:30 AMdhiabcalculate int
calculate :

- January 11th 2014, 05:13 AMMINOANMANRe: calculate int
it is equal to 4.

get out of the root the square root of 2 and then use the half angle formula for cosx...the rest is easy. - January 11th 2014, 04:37 PMProve ItRe: calculate int
Why would you take out ? It can already be turned into a half-angle and does not have any constant multiples...