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3 years ago

8

Find all solutions to 5cosθ = 3cosθ - 1.

1 answer:

IrinaVladis [17]3 years ago

6 0

Hello :
<span>5cosθ = 3cosθ - 1.
</span><span>5cosθ - 3cosθ = 1.
2cos</span>θ =1
cosθ =1/2
all solutions :
cosθ =cos<span>π<span>/3
</span></span>all solutions :
θ =π/3 +2kπ or θ = - π/3 +2kπ ....k in Z

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