Yang bisa ku tf dana 3k

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Jawab:

Penjelasan dengan langkah-langkah:

8. D. 3cos3x-4sin4x

9. E. -4cos2xsin2x

10. C. sinx+xcos

11. cos²x-sin²x

= cos2x

= cos2(1/6Ï€)

= cos1/3Ï€

= 1/2 A

caranya ada di gambar

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