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[" Lulamieamand "3.39],[" S.ilac "sin C+...

[" Lulamieamand "3.39],[" S.ilac "sin C+cos C+sin(2B+C)-cos(2B+C)=2sqrt(2)],[" the litat MABC is night-angled isosceles."]

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If ABC,sin C+cos C+sin(2B+C)-cos(2B+C)=2sqrt(2) Prove that ABC is right-angled isosceles.

If A B C ,sinC+cosC+sin(2B+C)-cos(2B+C)=2sqrt(2.) Prove that A B C is right-angled isosceles.

If A B C ,sinC+cosC+sin(2B+C)-cos(2B+C))=2sqrt(2.) Prove that A B C is right-angled isosceles.

If A B C ,sinC+cosC+sin(2B+C)-cos(2B+C)=2sqrt(2.) Prove that A B C is right-angled isosceles.

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If cos B=(sin A)/(2sin C) then prove that the triangle is isosceles.

If 2 cos A = (sin B)/(sin C) then show that the triangle is isosceles.

In Delta ABC, if sin A+sin B+sin B+sin C=1+sqrt(2) and cos A+cos B+cos C=sqrt(2) then the triangle is

(2sin (AC) cos C-sin (A-2C)) / (2sin (BC) cos C-sin (B-2C)) = (sin A) / (sin B)

(2sin (AC) cos C-sin (A-2C)) / (2sin (BC) cos C-sin (B-2C)) = (sin A) / (sin B)