Question

Can someone help me with some cos sin tan questions? I'm trying to understand it.

Answer 1

Cos = Adjacent line / the hypotenuse.
adjacent line = 8 (bc it's next to angle A)
hypotenuse = 10 (always the longest side in a right triangle)

So the cos of a would be 8/10 which we can simplify to 4/5.

Answer 2

That makes sense.

Answer 3

How would I solve tan 210 ?

Answer 4

Tan (210) as in degrees?

Answer 5

Yeah. I have to answer it in a fraction or a square root.

Answer 6

or a square root fraction.

Answer 7

\[\frac{ \sqrt{3} }{ 3 }\]
You just type tan 210 in your calculator and convert the decimal to the square root fraction

Answer 8

how would I do this?

Answer 9

In a 30-60-90 triangle, the hypotenuse is 2 times longer than the shortest leg.

Answer 10

is that the Pythagorean theorem too

Answer 11

Yep!