Question

Use a unit circle and 30°–60°–90° triangles to find the value in degrees of each expression. cos^-1(1/2) please help

Answer 1

cos = base by height, right?

Answer 2

yeah i guess i am so confused right now!

Answer 3

Don't be - calm down, it's just a stupid question :)

so, what is angle 'X' when cosX= 1/2

Answer 4

60 degrees?

Answer 5

Yes!! so, that's what cos^(-1)(1/2) would be!

Answer 6

Understanding this?

Answer 7

so the anwser is really 60 degrees? and not really can you help with a few more?

Answer 8

tan^-1(1/squareroot3)

Answer 9

Okay same funda - what is 'X' when tanX = 1/sqrt3??

Answer 10

Yeah the answer is 60 degrees actually! (for the first one)

Answer 11

is it 45 degrees?

Answer 12

Nope. tan45 =1 remember?

Answer 13

idk then?

Answer 14

oh its 30 degrees