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How Many Solutions Does 4sin2xcos2x=44 \sin ^{2} x-\cos ^{2} x=4 Have For

Question 52

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How many solutions does 4sin2xcos2x=44 \sin ^{2} x-\cos ^{2} x=4 have for 0x2π0 \leq x \leq 2 \pi ?

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