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Without Using Trigonometric Tables, Evaluate : Cosec 42 ∘ Sec 48 ∘ - Mathematics

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प्रश्न

Without using trigonometric tables, evaluate :

`("cosec"  42^circ)/sec 48^circ`

बेरीज
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उत्तर

`("cosec"  42^circ)/sec 48^circ`

= `("cosec" (90^circ - 48^circ))/sec 48^circ`

= `sec 48^circ/sec 48^circ`  [`because` sec (90-θ) = cosec θ]

= 1

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पाठ 7: Trigonometric Ratios of Complementary Angles - Exercises [पृष्ठ ३१२]

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आर. एस. अग्रवाल Mathematics [English] Class 10
पाठ 7 Trigonometric Ratios of Complementary Angles
Exercises | Q 1.5 | पृष्ठ ३१२
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