Question

in triangle abc <b=90°, ab= 3cm, cosA=3/5 what is the length of ac? ​

Answer 1

Answer:

Answer

sinC=

AC

AB

=

6

3

=

2

1

C=sin

−1

[

2

1

]=30

∘

∠B+∠C+∠A=180

∘

90

∘

+30+∠A=180

∘

∠A+=60

∘