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Northern IrelandFurther MathsQuick questions
Unit 1: Pure Mathematics
Quick questions on Trigonometry and identities - CCEA GCSE Further Mathematics (Unit 1 Pure)
1short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is sign errors in the cosine rule?Show answer
Keep the term negative, and watch for a negative cosine giving an obtuse angle.
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