Find the standard form of the equation for the ellipse satisfying the given conditions. Center (0, 0); foci (±2, 0); b = 3
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: C
Mathematics
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Use a calculator to decide whether the statement is true or false.cos (2 ? 90°) = cos2 90° - sin2 90°
A. True B. False
Mathematics
Perform the operation and simplify, or solve the equation for the variable.
? 
A. 
B. 
C. 
D. 
Mathematics
Use a calculator to evaluate the expression. Round your answer to the nearest thousandth.
A. -0.109 B. -0.063 C. -0.071 D. -0.058
Mathematics
Use the order-of-operations agreement to simplify.
+ 
- 
A. 
B. 
C. 
D. 
Mathematics