Verify the identity.cos2 
= 
What will be an ideal response?
cos2 
= 
2 = 
= 
? 
= 
= 
Mathematics
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Evaluate.5 sin2 300° + csc2 150° - sec2 30°
A. 
B. 
C. 
D. 
Mathematics
Solve the equation.
+ 3 = 6
A. {-5, 1} B. {5} C. ? D. {5, -1}
Mathematics
Use elimination by substitution to find the solution for the following system.
A. x = 2, y = 2 B. x = 1, y = 1 C. x = 1, y = 2 D. The system is inconsistent.
Mathematics
Perform the indicated operations and simplify the result. Leave the answer in factored form.
? 
A. - 
B. - 
C. - 
D. 
Mathematics