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प्रश्न
Use tables to find the acute angle θ, if the value of cos θ is 0.9574
बेरीज
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उत्तर
From the tables, it is clear that cos 16° 48’ = 0.9573
cos θ − cos 16° 48’ = 0.9574 − 0.9573 = 0.0001
From the tables, diff of 1’ = 0.0001
Hence, θ = 16° 48’ − 1’ = 16° 47’
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