tangent of 1/2 the angle whose cosine is 9/10
Exact value? What is wrong with a calculator? Paste this into your google search window...
tan(.5*arccos(9/10))=
Is that exact enough? It appears to be an irrational number.
find the exact value of the given expression. Thank you!
tan(1/2cos^-1(9/10)
2 answers
find the exact value of (5pie/8)