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Without Using Trigonometric Tables, Evaluate : Sec 11 ∘ Cosec 79 ∘ - Mathematics

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प्रश्न

Without using trigonometric tables, evaluate :

`sec 11^circ/("cosec"  79^circ)`

योग
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उत्तर

`sec 11^circ/("cosec"  79^circ)`

= `sec (90^circ - 79^circ)/("cosec"  79^circ)`

= `("cosec"  79^circ)/("cosec"  79^circ)`   [`because sec  (90 - theta) = "cosec"  theta`]

= 1

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

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आर.एस. अग्रवाल Mathematics [English] Class 10
अध्याय 7 Trigonometric Ratios of Complementary Angles
Exercises | Q 1.2 | पृष्ठ ३१२
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