1.

If 2cos 2cosa=1 then the value of a is​

Answer»

ong>Answer:

Cos⁻¹(π/6)

Step-by-step explanation:

Given, 2COS(2Cosa)=1

⇒Cos(2Cosa)=1/2

⇒cos(2Cosa)=Cos(π/3)

⇒2Cosa=π/3

⇒Cosa=π/6

⇒a=Cos⁻¹(π/6)



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