Answer:
I believe it is 42
Step-by-step explanation:
Angle 1 and 2 look similar so I think they are the same angle if you look at it, so I’m 99.9% sure it’s 42
The diagonals of a rhombus are perpendicular bisectors of each other. You can use the Pythagorean theorem. If the diagonals are length "a" and "b", the side length of the rhombus (s) is
s = (1/2)√(a²+b²)
Its 100 because its not rounded to the nearest whole like 200 because its less than 50 so it would round down
Cos² 2x = (1+cos 4x )/2
cos² 6x = (1+cos 12x)/2
subtract to get 1/2 (cos 4x - cos 12x )
= 1/2 (2 sin 4x sin 8x ) as cos A - cos B = 2 [ sin (A+B)/2 sin (A-B)/2 ]
so the answer
