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1.

यदि कोई रेखा , धनात्मक नियामक अक्षो के साथ ` alpha , beta , gamma ` कोण बनती है तो `sin^(2) alpha + sin^(2) beta + sin^(2) gamma =`A. 1B. 2C. 0D. -1

Answer» Correct Answer - B