Math help! (again)?

Question

I have no clue how to do part c in my book. The problem is listed at:
http://hotmath.com/help/solutions/cpmg02/7/2/Classwork/cpmg02_7_2_Classwork_T-18_264/index.html

Answer 1

Ok, here goes b)
1. This is how you start the problem, TanA=Opposite/Adjacent
Tan30*=x/20
2. Now, to get x all by it self multiply 20 to both sides.
Tan30*(20)=x
3. Use you calcualtor, push Tan, and include 30
Round your answer to 4 decimal places, your answer should be .5773
4. Then Multiply .5773 with 20=11.546

For c) do the same, but Angle B is the side near side x, so call x the adjacent, 20 for the Opposite. Why?? Because the side nearest to the angle has to be close to the hypotenuse.
So... Tan60*=20/x
Tan60*(x)=20
Tan of 60*=1.732x
1.732x=20
x=11.54
I guess you know the rest.

Good Luck

Answer 2

The tangent ratio is always defined as the value of the opposite leg to the angle divided by the adjacent led to the angle. Thus:

tan x=opposite/adjacent

In your case, the tangent of B would be defined as 20 (opposite) divided by x (adjacent), or:

tan 60=20/x

To solve for x, you would multiply by x and divide by the tangent of 60 degrees, giving you:

x=20/tan 60

If you forget that the tangent ratio is opposite divided by adjacent, you can use a simple acronym, sohcahtoa. This being:

sine=opposite/hypotoneuse

cosine=adjacent/hypotoneuse

tangent=opposite/adjacent

Answer 3

The secrete in trig. is knowing that;
sin of angle A = opposite sideof angle A / adjacent sideof angle A
cos of angle A= opposite sideof angle A / hypotnus side of angle A
tan of angle A = opposite side of angle A / adjacent sideof angle A

note: / means Devided

so for example in part (a)

tan A = opposite side of angle A / adjacent sideof angle A = X / 20
since angle A = 30, then,

tan 30 = opposite side of angle A / adjacent sideof angle A = X / 20,
therefore;
tan 30 = X/20,

since tan 30 = 0.578 (from your calc.)

so this makes;

0.578 = X/20,

therefore X = 20 x 0.578


****hope this helps******

Answer 4

You want to do part c, right?

if you look from the perspective of angle B, what's your opposite side's length? 20
If you look from the perspective of angle B, what's your adj. side's length? x

so you will have
tan 60 = 20/x

to solve for x... first multiply both sides by x

x tan 60 = 20

then divide both sides by tan 60

x = 20/ tan 60

I hope this helps

Answer 5

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Answer 6

Its .. oh no sorry i thought i has the answer but i misread the question .. sorry.
good luck xx

Answer 7

i don't get it!!!