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secondary 3 | A Maths
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Softy Mushy
Softy Mushy

secondary 3 chevron_right A Maths chevron_right Singapore

I have proved that LHS = 1-cosA. However, I can't solve how RHS= 1-cosA.

Date Posted: 2 years ago
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Joshua Yap
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Can't deny this is difficult. I've proved RHS = 1-cosA. At the quadratic factoring step, I just press calculator. I didn't use any factoring technique.