Use the given information to find the exact value of the trigonometric expression.sin ? = 
; The terminal side of ? lies in Quadrant I.
Find cos 2?.
A. 
B. - 
C. 
D. - 
Answer: D
Mathematics
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Find the acute angle, in radians, between the lines.5x - 2y = -10 and 4x + 5y = 4
A. 0.2900 radians B. 2.847 radians C. 1.277 radians D. 0.2942 radians
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Find the eccentricity of the conic.
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Find the perimeter. Use 3.14 for ? when needed.
A. 99 in. B. 228 in. C. 70 in. D. 94 in.
Mathematics
Simplify. Assume that no radicands were formed by raising negative quantities to even powers.
A. 
B. 
C. 21
D. 
Mathematics