Question

❤❤ What is the value of❤❤ :- cos 210⁰ ❤❤???​

Answer 1

Answer:

cos (180+30)= -cos (30)= -√3/2

Answer 2

Hey mate,

This is how you find the value of cos 210 :

By using the 180 ∘

Rule together with special triangle values, we get cos 210∘= cos (180∘+30∘)=−cos30∘=−√32

And the value of cos 210⁰ :

cos ( 180 + 30 ) =-cos ( 30 ) =√3/2

Hope it helps.