The Student Room Group
Reply 1
We won't just do your question for you. What is it that you're having problems with exactly? It's just a case of rearranging and taking the inverse tangent of both sides, remembering that if tanA=B\tan A = B then A=tan1B+nπA = \tan^{-1} B + n\pi (for all nZn \in \mathbb{Z}).
Reply 2
I got the answer as -90n + 9.1, when it's -90n - 9.1.

50-2x=68.1
-2x=18.1

Then: 180n + 68.1
-90n + 9.1.

Oooooh I actually release now... okay sorry for my silliness. you divide both by 2x. Gahhh thanks!

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