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Question
sec 70° sin 20° + cos 20° cosec 70° = ?
Options
0
1
2
–2
MCQ
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Solution
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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