Question

if c=75 degrees and a= 2/5 c find angle b

Answer 1

Step-by-step explanation:

In triangle ABC,

a=2

B=60

∘

C=75

∘

b=?

Angle A=180

∘

−B−C=45

∘

Now in a triangle,

a

sinA

=

b

sinB

=

c

sinC

So,

2

sin45

∘

=

b

sin60

∘

2

2

1

=

2b

3

b=

3

×

2

=

6