Question

Solve the Triangle:
A = 51°, b = 41, c = 40

Answer 1

Apply Cosines Law, since you have SAS case

Answer 2

c^2 = a^2 + b^2 – 2ab cos C
and
a^2 = b^2 + c^2 – 2bc cos A
and
b^2 = a^2 + c^2 – 2ac cos B.
Which one would I use?

Answer 3

Given b, and c => find a

Answer 4

a² = b² + c² – 2bc cos A

Answer 5

cos A = (b^2+c^2-a^2)/2bc

Answer 6

No, this time you find the third side a!

Answer 7

41^2+40^2=a^2
3281=a^2
sq rt (3281)=57.3
a= 57

Answer 8

Check your formula again!

Answer 9

Lol Oh Sorry
this time i wouldn't have to change it would I?
just plug in numbers?

Answer 10

a² = b² + c² – 2bc cos A

Answer 11

a² = b² + c² – 2bc cos A
a²=1681+1600-3280*.629
a²=3281-2063
a²=1218
a=34.89

Answer 12

Correct, I guess you're not familiar with using the calculator, so it takes you so long to get the result !

Answer 13

no i dont know how to use this calculator lol its new and there is alot more buttons then my old one. haha. its hard to find some things on this one.

Answer 14

Now, do same thing as your previous post! Apply Sines Law to find the second angle

Answer 15

i have ten minutes to get the rest of this one and the other two triangles done.
can you give my the answers then we can go back and work threw them?
if not thats fine ill just turn in what i have. but if so that would be really awesome.

Answer 16

I tend to forget, so by the time you answer I already forgot what is the next step :(

Answer 17

so B=sin b/b?

Answer 18

The second angle is 65.98

Answer 19

Then it's so easy to find the rest!

Answer 20

here is the next triangle

Answer 21

3. A = 23°, B = 55°, b = 9

Answer 22

C=102 degrees

Answer 23

@CynthiaJune94 Please open the new post for each question!

Answer 24

a=sin A/A
right?