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If 2cos 2cosa=1 then the value of a is |
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Answer» ong>Answer: Cos⁻¹(π/6) Step-by-step explanation: ⇒Cos(2Cosa)=1/2 ⇒cos(2Cosa)=Cos(π/3) ⇒2Cosa=π/3 ⇒Cosa=π/6 ⇒a=Cos⁻¹(π/6) |
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