Express cot 85° + cos 75° in terms of trigonometric ratios of angles between 0° and 45°
NCERT Class X
Mathematics - Mathematics
Chapter _INTRODUCTION TO
TRIGONOMETRY
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cot 85° + cos 75°
cot (90° - 5°)+ cos (90°- 15°)
tan 5° + sin 15°
cot (90° - 5°)+ cos (90°- 15°)
tan 5° + sin 15°
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