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![]() | EX 2 Solving Trig Eqns Using Identities (sin squared x - cos2x = -1/4) (mathstuff) View |
![]() | Pre-Calculus Prep: Solve 0 = cos2x + 3sinx + 4sin^2x Using the Double-Angle Trig Identity (Math Teacher GOAT) View |
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![]() | Solve (sin^2x)(cos3x)+(cos3x)(cos^2x)=1/2 (Mark Dwyer (204tutor)) View |
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