Use a half-angle formula to find the exact value of the expression.cos 112.5°

A. -  
B.  
C. -  
D. -  


Answer: D

Mathematics

You might also like to view...

Decide whether the statement makes sense. Explain your reasoning.I drove really far, almost 200 kilometers per hour.

What will be an ideal response?

Mathematics

Use polar coordinates to find the limit of the function as (x, y) approaches (0, 0).f(x, y) = 

A. 0 B. -1 C. ? D. 1

Mathematics

Provide an appropriate response.Add: 813 + 502 + 307

A. 1,602 B. 1,622 C. 1,612 D. 9,388 E. none of the above

Mathematics

Change the exponential expression to an equivalent expression involving a logarithm.52 = 25

A. log225 = 5 B. log525 = 2 C. log255 = 2 D. log52 = 25

Mathematics