If ² 48^ - ² 12^ ² 24^ - ² 6^ = + 5 2 , where , N , then + is equal to _ _ _ _ _

Step-by-step solution

Using ^2A - ^2B = (A+B) (A-B) : ^2 48° - ^2 12° = 60° 36° = 1 2 36° . Using ^2A - ^2B = (A+B) (A-B) : ^2 24° - ^2 6° = 30° 18° = 1 2 18° . Ratio = 36° 18° = (1+ 5 )/4 ( 5 -1)/4 = (1+ 5 )^2 4 = 6+2 5 4 = 3+ 5 2 . = 3, = 1 . + = 4 .