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6. a b c are the angles of a triangle If (1 - sin a)(1 - Sin b)( 1 - sin c)=(1 + sin a) (1 + sin b)( 1 + sin c) Then prove each side of the triangle =( cos a cos b cos c) |
| Answer» 6. a b c are the angles of a triangle If (1 - sin a)(1 - Sin b)( 1 - sin c)=(1 + sin a) (1 + sin b)( 1 + sin c) Then prove each side of the triangle =( cos a cos b cos c) | |