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1. |
If (1 + sin A) (1 + sin B) (1 + sin C) = (1 sin A) (1 sin B) (1 sin C), 0 < A, B, C < ( / 2) then each side is equal to |
A. | sin A sin B sin C |
B. | cos A cos B cos C |
C. | tan A tan B tan C |
D. | 1 |
Answer» C. tan A tan B tan C | |