## Step 1 :

Pulling out like terms :1.1 Pull out like factors:tanx - txco=tx•(an - co)

Equation at the end of step 1 :

## Step 2 :

Theory - Roots of a hàng hóa :

2.1 A hàng hóa of several terms equals zero.When a hàng hóa of two or more terms equals zero, then at least one of the terms must be zero.We shall now solve each term = 0 separatelyIn other words, we are going to solve as many equations as there are terms in the productAny solution of term = 0 solves sản phẩm = 0 as well.

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Solving a Single Variable Equation:2.2Solvetx=0 Setting any of the variables to zero solves the equation:t=0x=0

Solving a Single Variable Equation:

2.3Solvean-co=0 In this type of equations, having more than one variable (unknown), you have to specify for which variable you want the equation solved.We shall not handle this type of equations at this time.

x=0t=0

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