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sin2x = tanx Take everything to left hand side, so LHS equals 0sin2x - tanx = 0Recall double angle formula : sin2x = 2sinxcosx, also notice that tanx can be written as sinx/cosx givi...
Firstly, we define a tangent as a straight line touching a curve at 1 point only.We can describe a straight line using this linear relation:y - y1 = m.(x - x1)We know a point on this...
Two ways of doing this, substitution and elimination. Could teach both so students choose which they preferSubstitution;change the second equation into x=3y+9 then substitute it into the first equat...
4(x + 3) = 2x + 8The first step in solving this equation is to expand the brackets on the left hand side. A bracket means that the contents of the bracket should be multiplied by whatever is outside of th...
2x + 14 = 18Whatever you do on one side, e.g. LHS, you do the same on the RHS.-14 from both sides 2x + 14 (-14) = 18 (-14)2x = 4To get x by itself you need to divide it by 2. so you divide LHS and RHS by ...
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