Math, asked by arpitashah28101977, 12 days ago

if | cos^-1 x| <π/3 ,then the set of exhaustive values of x is​

Answers

Answered by amitnrw
3

Given :   | cos⁻¹ x | < π/3  

To Find : values of x

Solution:

Principle Range of cos⁻¹ is  [0  , π]

Hence | cos⁻¹ x |  = cos⁻¹ x  

cos⁻¹ x   <  π/3  

cos⁻¹   (1/2)   =  π/3

cos⁻¹   (√3 / 2)    =  π/6

cos⁻¹    1   =    0

Hence     x  ∈ (1/2 ,  1 ]

x   ∈ (1/2 ,  1 ]

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