Was known for be a trust buster, conservationist, and leading the rough riders in spanish american war.

 ce.  Theodore Roosevelt

Explanation:

Theodore Roosevelt was a notable commander of the 1st United States Volunteer Cavalry, also referred to as The Rough Riders.

Roosevelt with the Rough Riders participated in the Spanish-American War in 1898. The battles they engaged in were the Battle of Las Guasimas, the Battle of San Juan Hill and the Siege of Santiago.

Before becoming the commander of the voluntary Rough Riders, Theodore Roosevelt was the Assistant Secretary of the Navy. Theodore Roosevelt became President of The U.S. in 1901.

angle a = 40.6°

step-by-step explanation:

for any right angle triangle we know the pythagoras theorem reveals

hypotenuse² = height²+base²

by this formula we will calculate the length of hypotenuse

h² = 6²+7²

⇒ h =√36+49 = √85 = 9.22

now from the given triangle sin a = height/ hypotenuse

                                                sin a = 6/9.22 = 0.651

therefore

so angle a = 40.6°

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