# Answer to Question #245 in Trigonometry for Huynh Nguyen

Question #245

I can not do this question, please help. For any triangle ABC, prove that c^2=(a+b)^2[1-k^2cos(1/2)C].

Expert's answer

Try to use the sinus and cosinus theorems for proof. If you want more detailed answer just submit your assignment to our site and our experts will help you.

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