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यदि सम्मिश्र संख्याएँ "sin"x + "i cos" 2...

यदि सम्मिश्र संख्याएँ `"sin"x + "i cos" 2x` और `"cos" x - i "sin" 2x` एक-दूसरे की संयुग्मी हैं, तो

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