Question

Given triangle ABC and side a = 21; side b = 20. Find the measurement of angle B if angle C is a right angle.

Answer 1

http://fouss.pbworks.com/f/tigratios.JPG

\(\bf tan(\theta) = \cfrac{opposite}{adjacent}\implies tan^{-1}(tan(\theta) = tan^{-1}\left(\cfrac{opposite}{adjacent}\right)\\ \quad \\
\theta = tan^{-1}\left(\cfrac{opposite}{adjacent}\right)\)

Answer 2

so would it be 46.4

Answer 3

well.... I get .. something. else... make sure your calculator is in Degrees mode

Answer 4

ok 17.8 would be correct then

Answer 5

https://www.google.com/search?client=opera&rls=en&q=arctan(20/21)+in+degrees&sourceid=opera&ie=utf-8&oe=utf-8&channel=suggest

Answer 6

yw