حمّل تطبيق منهاجي الجديد

منهاجي صار أسرع من خلال التطبيق

  مهارات التفكير العليا

مهارات التفكير العليا

الاقترانات المثلثية

33) تحدّ: يُبين الشكل المجاور قطاعين دائريين ناتجين من دائرتين متحدتين في المركز. إذا كان قياس زاوية القطاعين 0.75، ومساحة الجزء المظلل 30 cm2، فأجد قيمة x.

الاقترانات المثلثية

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell A equals 1 half left parenthesis 3 x right parenthesis squared left parenthesis 0.75 right parenthesis minus 1 half left parenthesis 2 x right parenthesis squared left parenthesis 0.75 right parenthesis end cell row blank cell 30 equals 27 over 8 x squared minus 3 over 2 x squared not stretchy rightwards arrow x squared equals 16 not stretchy rightwards arrow x equals 4 end cell end table end style

 

تبرير: أثبت كلاً ممّا يأتي، مبرراً إجابتي:

34) begin mathsize 20px style tan invisible function application space 210 to the power of ring operator plus tan invisible function application space 240 to the power of ring operator equals fraction numerator 4 square root of 3 over denominator 3 end fraction end style

begin mathsize 20px style t a n invisible function application 210 to the power of ring operator plus t a n invisible function application 240 to the power of ring operator equals t a n invisible function application 30 to the power of ring operator plus t a n invisible function application 60 to the power of ring operator equals fraction numerator 1 over denominator square root of 3 end fraction plus square root of 3 equals fraction numerator 4 over denominator square root of 3 end fraction equals fraction numerator 4 square root of 3 over denominator 3 end fraction end style

35) begin mathsize 20px style fraction numerator sin invisible function application space 30 to the power of ring operator plus sin invisible function application space 60 to the power of ring operator over denominator sin invisible function application space 45 to the power of ring operator end fraction equals 1 half left parenthesis square root of 2 plus square root of 6 right parenthesis end style

begin mathsize 20px style fraction numerator sin invisible function application 30 to the power of ring operator plus sin invisible function application 60 to the power of ring operator over denominator sin invisible function application 45 to the power of ring operator end fraction equals fraction numerator 1 half plus fraction numerator square root of 3 over denominator 2 end fraction over denominator fraction numerator square root of 2 over denominator 2 end fraction end fraction equals fraction numerator 1 plus square root of 3 over denominator square root of 2 end fraction cross times fraction numerator square root of 2 over denominator square root of 2 end fraction equals fraction numerator square root of 2 plus square root of 6 over denominator 2 end fraction end style

 

 

إعداد : شبكة منهاجي التعليمية

16 / 03 / 2023

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