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panda833
@panda833
July 2022
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Pls: cos^2x - sin
^2x = 1.
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mmb1
Verified answer
cos^2x - sin
^2x = 1.
cos^2 4x=1
4x=2piN
x=PiN/2
3 votes
Thanks 2
1234567890йцйц
Cos² x – sin² x=cos2x=-1/2
2x=±arccos(-½)+2πk, k ε Z
x=±2π/6+πk=±π/3+πk.
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Answers & Comments
Verified answer
cos^2x - sin^2x = 1.cos^2 4x=1
4x=2piN
x=PiN/2
2x=±arccos(-½)+2πk, k ε Z
x=±2π/6+πk=±π/3+πk.