Toán Lớp 11: Giải phương trình
1. $sin^{2}x$ + $sin^{2}2x$ + $sin^{2}3x$ = 2
2. 2$sin^{2}2x$ + sin7x = 1 + sinx
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Toán Lớp 11: Giải phương trình
1. $sin^{2}x$ + $sin^{2}2x$ + $sin^{2}3x$ = 2
2. 2$sin^{2}2x$ + sin7x = 1 + sinx
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