Express cot 85+cos 75 in terms of trigonometric ratios of angles between 0°and75°
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adityapatil12102003
Secondary SchoolMath 5+3 pts
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
Report by PadmaShere 10.06.2015
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nikitasingh79
Nikitasingh79 ★ Brainly Teacher ★
Given :
Cot 85°+Cos75°
Formula used:
[cot(90°-thetha)=tan thetha &
cos(90°-thetha)= sin thetha]
cot(90°-5°)+cos(90°-15°)
tan 5° + sin 15°
Answer is :
tan 5° + sin 15°.
Answered by
1
Answer:
Step-by-step explanation:
Cot 85°=tan(90°-85°)
So it becomes tan 5°
Cos 75°=sin(90°-75°)
So it becomes sin 15°
Therefore,tan 5° and sin 15° lies between 0° and 75°
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