Use the fundamental identities to simplify the expression.cos x tan x
A. 1
B. cos x
C. sin x
D. cot x
Answer: C
Mathematics
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Prove the identity.cos 2x = 2 cos4 x + 2 sin2x cos2x - 1
What will be an ideal response?
Mathematics
Solve the problem.Find the amount of money in an account after 5 years if $2800 is deposited at 7% annual interest compounded monthly.
A. $3949.68 B. $3961.38 C. $3969.35 D. $3927.14
Mathematics
Factor any perfect square trinomial, or state that the polynomial is prime.121x2 - 22x + 1
A. (11x + 1)(11x - 1) B. prime C. (11x - 1)2 D. (x - 11)2
Mathematics
Solve the equation.(x - 2)(56x2 + 73x + 21) = 0
A. 
B. 
C. {2}
D. 
Mathematics