Answer:
I think the calculation answer will be 9,999,811,112
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Answer: Choice B 
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Work Shown:
Angle theta is between 0 and pi/2, so this angle is in quadrant Q1.
Square both sides of the given equation

Then use the pythagorean trig identity to get

The difference starts off by 7. Then it continues to double. Then the answer is 14, 28, 42. The answer doubles every time.