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Simplifying 3(sinx + -1cosx) = cosx Reorder the terms: 3(-1cosx + insx) = cosx (-1cosx * 3 + insx * 3) = cosx (-3cosx + 3insx) = cosx Solving -3cosx + 3insx = cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-1cosx' to each side of the equation. -3cosx + -1cosx + 3insx = cosx + -1cosx Combine like terms: -3cosx + -1cosx = -4cosx -4cosx + 3insx = cosx + -1cosx Combine like terms: cosx + -1cosx = 0 -4cosx + 3insx = 0 Add '-3insx' to each side of the equation. -4cosx + 3insx + -3insx = 0 + -3insx Combine like terms: 3insx + -3insx = 0 -4cosx + 0 = 0 + -3insx -4cosx = 0 + -3insx Remove the zero: -4cosx = -3insx Divide each side by '-4osx'. c = 0.75ino^{-1}Simplifying c = 0.75ino^{-1}

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