Use a sum or difference identity to find the exact value.sin 255° cos 15° - cos 255° sin 15°
A. - 
B. - 
C. 
D. - 
Answer: D
Mathematics
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Evaluate the integral.
A. 2232 B. 31 C. 279 D. 248
Mathematics
The relationship between the Fahrenheit and Celsius temperature scales is given by the linear function.
What is the F-intercept and what does it represent?
a. 9/5, Fahrenheit temperature corresponding to 0°C
b. 9/5, Celsius temperature corresponding to 32°C
c. 32, Celsius temperature corresponding to 0°F
d. 0, Fahrenheit temperature corresponding to 32°C
e. 32, Fahrenheit temperature corresponding to 0°C
Mathematics
Solve the triangle.a = 60, b = 8, C = 120°
A. c = 70.17, A = 51.8°, B = 8.2° B. c = 64.37, A = 53.8°, B = 6.2° C. c = 67.27, A = 55.8°, B = 4.2° D. no triangle
Mathematics
Evaluate.Given f(x) = 2x2 + 5x + 1, find f(-2).
A. -1 B. -2 C. 14 D. -13
Mathematics