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sa se exprime in grade: π supra 4 ; 7π supra 6 ;- 9π supra 5 ;; va multumesc



Răspuns :

trigonometrie π radiani = 180⁰
π/4=180⁰/4=45⁰
7π/6=7x180⁰/6=210⁰
-9π/5=-9x180⁰/5=-324⁰