Use a half-angle formula to find the exact value of the expression.tan 105°
A. -
+ 2
B. 
+ 2
C. -
- 2
D. 
- 2
Answer: C
Mathematics
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Solve the initial value problem.
= 3t + sec2 t, r(-?) = -2
A. r = 
t2 + cot t - 2 - 
?2
B. r = 3 + tan t - 5
C. r = 
t2 + tan t - 2 - 
?2
D. r = 3t2 + tan t - 2 - 3?2
Mathematics
Find the standard-form equation for a hyperbola which satisfies the given conditions.A hyperbola centered at the origin having focus (
, 0) and corresponding directrix 
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Mathematics
Find a formula of the sequence. Use an notation. Use a graphing calculator table to verify your formula.2, 1, 
, 
, ...
A. an = 2 ? 2n-1
B. an = 
(2)n-1
C. an = 2 
n-1
D. an = 2 
n-1
Mathematics
The two triangles below are similar. Find the length of any missing side.
A. x = 34 B. x = 28 C. x = 36 D. x = 45
Mathematics