Question

Rezolvați Ecuatiile (1-19)
cos5x=0
2cos2x-1=0
sin3x=0
cos4x=1




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Answer 1

cos5x = 0

5x = π/2 + kπ

x = π/2 × 1/5 + kπ/5 = π/10 + kπ/5

___________

2cos(2x - 1) = 0

cos(2x - 1) = 0

2x - 1 = π/2 + kπ

2x = π/2 + 1 + kπ

x = π/2 × 1/2 + 1/2 + kπ/2 = π/4 + 1/2 + kπ/2

___________

sin3x = 0

3x = kπ

x = kπ/3

___________

cos4x = 1

4x = 2kπ

x = 2kπ/4 = kπ/2

Answer 2

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