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(Solved): Find sec1(4.2) (in radians). (Hint: Use cos1 ) ...



Find \( \sec ^{-1}(4.2) \) (in radians). (Hint: Use \( \cos ^{-1} \) )
Find (in radians). (Hint: Use )


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Let, sec?1(4.2)=xsec?x=4.2Expla
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