Question

using this triangle that is attached
Find AB if BC= 3.42, AC= 10, β=70, α=20

using this triangle that is attached
Find AB if BC= 3.42, AC= 10, β=70, α=20

@Mathematics

Answer 1

[cos(alpha)] x [BC] = AB

Answer 2

Are you here?

Answer 3

yea

Answer 4

We are given the hypotenuse as 10. We also know that angle alpha must equal 20 degrees. We now can find BC.!:
Sin 20 degrees=3.42/10 Agree 3.42 is the opposite side, and 10 is the hypotenuse.??

Answer 5

ok

Answer 6

Sin 20 degrees......wait a minute, we already know BC We are looking for AB

Answer 7

restart: Cos 20 degrees= AB/10 AB being the adjacent side, and 10 the hypotenuse.

Answer 8

Using some algebraic manipulations, this can be rearranged to be:
AB=10 Cos 20 deg. do you follow this transition?

Answer 9

My calc says 9.39 seems rather large alsmost as long as the hypotenuse lol

Answer 10

yeah thanks very much for the help here

Answer 11

the 9.39 worked

Answer 12

You have a good evening, TV time for me lol.

Answer 13

lol ok thanks for the help once again

Answer 14

ur welcome