Solve the equation in the interval [0, 2?). Express solutions as approximations to the nearest hundredth.2 sin2x + sin x + 1 = 0
A. ?
B. {4.71}
C. {0.52, 2.62}
D. {0.52, 2.62, 4.71}
Answer: A
Mathematics
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Solve the problem.Syed, who is 1.87 m tall, wishes to find the height of a tree with a shadow 30.90 m long. He walks 19.88 m from the base of the tree along the shadow of the tree until his head is in a position where the tip of his shadow exactly overlaps the end of the tree top's shadow. How tall is the tree? Round to the nearest hundredth.
A. 2.91 m B. 5.24 m C. 3.07 m D. 1.87 m
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Write the augmented matrix for the system.
A. 
B. 
C. 
D. 
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Use even and odd properties of the trigonometric functions to find the exact value of the expression.cos 
A. - 
B. 
C. 
D. - 
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Tell whether the equation determines y to be a function of x.
A. no B. yes
Mathematics