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Simplifying 4tan2x + -4senx = sen2x + cos2x Reorder the terms: 4an2tx + -4ensx = cos2x + en2sx Solving 4an2tx + -4ensx = cos2x + en2sx Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '4ensx' to each side of the equation. 4an2tx + -4ensx + 4ensx = cos2x + 4ensx + en2sx Combine like terms: -4ensx + 4ensx = 0 4an2tx + 0 = cos2x + 4ensx + en2sx 4an2tx = cos2x + 4ensx + en2sx Divide each side by '4n2tx'. a = 0.25cn-2os2t-1 + en-1st-1 + 0.25est-1 Simplifying a = 0.25cn-2os2t-1 + en-1st-1 + 0.25est-1
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