if cosA=5/6, then what is the positive value of cos1/2A, in simplest radical form with a rational denominator

Jacks bank statement shows an account balance of -$25.50. which describes the magnitude, of size, of the debt in dollars

∆red ≅ ∆ by rule will give brainiest if possible

Select the correct answer. what is the exact value of sin (157.5°)? a. 'sqrt(2 - sqrt(2))/2 b. *"-"'sqrt(2 + sqrt(2))/29 c.'sqrt(2 + sqrt(2))/4" d. "-"sqrt(2 + sqrt(2))/4)