Thread: Right angled triangle help

Ok, I have a few questions I need some help with please!

using a right angled triangle ABC where B = 90 degrees find

A)BC
B)AB

if

i) AC = 10cm and A =32 degrees
ii) AC = 12cm and A = 46 degrees
iii) AC = 6cm and C = 42 degrees

Originally Posted by Kim2425

...
using a right angled triangle ABC where B = 90 degrees find
A)BC
B)AB

if

i) AC = 10cm and A =32 degrees
ii) AC = 12cm and A = 46 degrees
iii) AC = 6cm and C = 42 degrees
...

Hello,

use the definitions of Sine or Cosine. With your triangle:





Now use the given values to calculate the missing one:

to i)



to ii)



to iii)

90° - C = A = 48°. Use the formulas as above:




EB