Math, asked by avika4789, 11 hours ago

cos 5 x minus 40° is equal to half then x is equal to

Answers

Answered by sohampande58

1

Answer:

20°

Step-by-step explanation:

Cos 60° = 1/2

∴ Cos 60° = Cos(4x - 40)

On Comparing

60 = 4x - 40

100 = 4x

20 = x

∴ The value of x is 20°

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