मराठी

Sec 70° sin 20° + cos 20° cosec 70° = ?

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प्रश्न

sec 70° sin 20° + cos 20° cosec 70° = ?

पर्याय

  • 0

  • 1

  • 2

  • –2

MCQ
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उत्तर

2

Explanation:

Given expression = sec 70° sin (90° – 70°) + cos 20° cosec (90° – 20°) 

= sec 70° cos 70° + cos 20° sec 20°

= 1 + 1

= 2

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पाठ 12: Trigonometric Ratios of Some Complemantary Angles - MULTIPLE-CHOICE QUESTIONS (MCQ) [पृष्ठ ५९३]

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आर. एस. अग्रवाल Mathematics [English] Class 10
पाठ 12 Trigonometric Ratios of Some Complemantary Angles
MULTIPLE-CHOICE QUESTIONS (MCQ) | Q 7. | पृष्ठ ५९३
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