Why do you think Argentina's mil itary dictatorships cracked down on dissent?

Find a counterexample to show that $\cos 2 \theta=2 \cos \theta$ is not an identity.

Determine whether the sequence defined as follows is convergent or divergent:

$$a_1 = 1\qquad a_{n + 1} = 4 - a_n\qquad \text{for } n \geqslant 1$$

Match the statement with the most appropriate choice from the column on the right. \

$$\begin{array}{ll}\text {a) A coefficient} & \text { b) Equivalent expressions } \\ \text { c) Equivalent equations } & \text { d) The multiplication principle } \\ \text { e) The addition principle } & \text { f) A solution } \end{array}$$

$\underline{\qquad \qquad}$ The expressions $3(x-2)$ and $3x-6$.

Abbreviate the following item on the line provided. Example 1. one dozen $\underline{\text{\color{#c34632}1 doz}}$

$10$ in the morning, Sunday, April first

If $\frac 9 {23} = 0.\overline{3913043478260869565217}$, what is the 900th digit in the decimal expansion?

For the following exercise,

Prove the identity.

$$\tan ^3 x-\tan x \sec ^2 x=\tan (-x)$$

For the following exercise,

Prove the identity given.

$$\sin (2 x)=-2 \sin (-x) \cos (-x)$$

Verify that the equation is an identity.

$$\csc A \sin 2 A-\sec A=\cos 2 A \sec A$$

On the lines provided, write each of the following words, adding the prefixes given.

Example 1. mis + use = $\underline{\color{#c34632}\text{{misuse}}}$

pre +fabricate = _______________________________

Perform the indicated operation.

$$2.5-0.5$$

Write a radical function with a domain of all real numbers greater than or equal to 2 and a range of all real numbers less than or equal to 5.

Verify that the following is an identity.

$$2 \cos ^2 \frac{x}{2}=1+\cos x$$

Use the integral test to determine whether the series is convergent or divergent. $\sum_{n=1}^{\infty} \frac{n}{\left(n^2+1\right)^{3 / 2}}$