Express cot 85° + cos 75° in terms of trigonometric ratios of angles between 0° and 45°.

+1 vote
85 views
asked May 7, 2017 in Mathematics by Rohit Singh (61,782 points) 36 143 462

1 Answer

+1 vote
answered May 7, 2017 by Rohit Singh (61,782 points) 36 143 462
 
Best answer

Solution : cot 85° + cos 75° = cot (90° – 5°) + cos (90° – 15°)
= tan 5° + sin 15°

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

One Thought Forever

“There is a close connection between getting up in the world and getting up in the morning.“
– Anon
~~~*****~~~

...