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Maths prob! Need HELP pls!!!

Thread starter lakshanhettiarachchi
Start date Jun 25, 2009

L

lakshanhettiarachchi

Member

Jun 25, 2009

#1

1 + cot A / sin A = cot A/2

Prove using double angle formula.

Any help is appreciated!

EYE

Member

Jun 25, 2009

#2

cos a/sina2+1 first step for sure

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