Evaluate the expression.cos (sin-1 
+ cos-1 
)
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Multiply the monomial and the polynomial.-9x2y(4x2y4 - 9xy3 + 4)
A. -36x4y5 + 81x3y4 - 36x2y B. -36x4y5 + 81x3y4 - 36 C. -36x2y5 + 81x3y4 - 36x2y D. -36x4y5 - 81x3y4 + 36x2y
Mathematics
Decide whether or not the given equation is an identity.csc x tan x = cos x csc2 x
A. Yes B. No
Mathematics
Solve the problem.Find the volume of a cone with radius 11 km and height 2.6 km rounded to the nearest hundredth. Use 
A. 987.844 km3 B. 1317.13 km3 C. 29.93 km3 D. 329.28 km3
Mathematics
Solve the problem.Find the missing length in the following right triangle. If necessary, round to the nearest tenth. 
A. 12 cm B. 14.5 cm C. 72.5 cm D. 145 cm
Mathematics