If θ is an angle in standard position whose terminal side passes through (3, 4), evaluate tan(1/2)θ.
1/4
3/10
1/2
4/5

The tangent half angle formula, one of several, is

We have θ is opposite 4 in the 3/4/5 right triangle so

1/2

This is actually pretty deep.  It says half the big acute angle in the 3/4/5 triangle is the small diagonal angle of the 1x2 rectangle.   Similarly, the small acute angle in 3/4/5 triangle is twice the small diagonal angle of the 1x3 rectangle.

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

answer

you start with $5 and save $10 a week until you have at least $45wer

step-by-step explanation: