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Use trigonometric identities to solve each equation within the given domain. 4cos4(x) – 5cos2(x) + 1 = 0 from [0, 2π). PLEASE SHOW WORK!!!
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Feb 7, 2022
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Use trigonometric identities to solve each equation within the given domain.
4cos4(x) – 5cos2(x) + 1 = 0 from [0, 2π). PLEASE SHOW WORK!!!
Mathematics
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Rambo
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4cos ^4(x) -5cos^2(x)+1=0
(u^-1) (4u^-1)=0
(u^-1)=0
u^=1
u=√1
u=1
u=±1
cos (x)=±1
x=0 or π
4u^-1=0
4u^=1
u^=1/4
u=√1/4
u=1/2
u= ±1/2
cos (x)=±1/2
x= π/3 or 4π/3
x= 0, π/3, π, 4π/3
RMWChaos
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Feb 11, 2022
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RMWChaos
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