Use the fundamental identities to find the value of the trigonometric function.Find cos ? if tan ? = 4 and sin ? < 0.
A. - 17
B. - 
C. - 
D. 
Answer: B
Mathematics
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Evaluate the integral.
A. ?2
B. 
C. 
D. 2?2
Mathematics
Use a negative-angle identity to write an equivalent trigonometric expression involving a positive angle.sec 
A. csc 
B. sec 
C. -sec 
D. 1 - sec 
Mathematics
Solve the equation.x2 + x - 56 = 0
A. -8, -7 B. 7, 8 C. -7, 8 D. -8, 7
Mathematics
Solve the inequality by using algebraic and graphical methods. Round to three decimal places, if necessary.(x - 4)3 < 108
A. x < 1.769 B. x < 9.769 C. x < 8.762 D. x < 10
Mathematics