Complete the identity.
= ?
A. cos (2?) + sin ? cos ?
B. 4 cos2 ? - 1
C. 2 cos (2?)
D. 2 sin ? cos ?
Answer: B
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Find the value. Give an approximation to four decimal places.ln 43,100,000
A. 17.5790 B. 6.0661 C. 0.0567 D. 7.6345
Find the difference.- 
- 
A. - 
B. - 
C. 
D. 
Solve the problem using your calculator.A study was conducted to compare the average time spent in the lab each week versus course grade for computer students. The results are recorded in the table below. Use linear regression to find a linear function that predicts a student's course grade as a function of the number of hours spent in lab. Number of hours spent in lab Grade (percent) 10 96 11 51 16 62 9 58 7 89 15 81 16 46 10 51
A. y = 44.3 + 0.930x B. y = 1.86 + 88.6x C. y = 0.930 + 44.3x D. y = 88.6 - 1.86x
Find the exact value. If the value of the function is not defined, write undefined.sec 8?
A. Undefined B. 0 C. -1 D. 1