Question

1. In SABC, if a=2 , b=1 & G = √3, the find cost-A​

Answer 1

Answer:

a=4,b=3,∠A=60

0

Using cosine rule,

cosA=

2bc

b

2

+c

2

−a

2

we have

⇒

2

1

=

6c

9+c

2

−16

⇒3c=9+c

2

−16

⇒c

2

−3c−7=0

Answer 2

Step-by-step explanation:

a=4,b=3,angle =60

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