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Edexcel C3 Trig Urgent help needed Ex6F Q6a watch
- Thread Starter
- 30-01-2010 23:17
- 31-01-2010 15:00
You're trying to prove an identity.
Start with the LHS.
Then replace the tan and cot with sin's and cos's. Multiply out, collect and simplify. Then show it equals RHS. Underline and write QED.