The value of (sec245° – cot245°) – (sin230° + sin260°)

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sec²45° – cot²45° – sin²30° – sin²60° = (√2)² - 1 -		1		²	-		1		²
		2					2

sec²45° – cot²45° – sin²30° – sin²60° = 2 - 1 -	1	-	3
	4		4

sec²45° – cot²45° – sin²30° – sin²60° = 1 -	1	-	3
	4		4

sec²45° – cot²45° – sin²30° – sin²60° =	3	-	3	= 0
	4		4