• Matematika
  • TRIGONOMETRI Kelas 10 SMA
  • Trigonometri
  • Fungsi Trigonometri

Video solusi : Suppose that tan theta=2 and 0<theta<pi/2 . a. Compute sin theta and cos theta . b. Using the values obtained in part (a), make the substitutions x=X cos theta-Y sin theta and y=X sin theta+Y cos theta in the expression 7x^2-8 x y+y^2, and simplify the result.

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