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Rajan@2021
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Without using trigonometric tables, evaluate: cosec 42°/sec 48°

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This is the basic and conceptual question from trigonometric ratios in which we have to find cosec 42°/sec 48° without using trigonometric tables,

RS Aggarwal, Class 10, chapter 12, question no 1(v).

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  1. cosec42°/sec48°

    =1/sin42°/1/cos48°

    =cos48°/sin(90°-48°)

    =cos48°/cos48°

    =1

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