Question

rmp ≈ abc, then <p= if<b=30°and <c=and<c=80° ​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

Answer Text

45∘45∘

60∘60∘

90∘90∘

120∘120∘

Solution :

Answer Text

45∘45∘

60∘60∘

90∘90∘

120∘120∘

Solution :

We have cos B=c2+a2−b22ca⇒3–√2=3b2+a2−b22×3b−−√×aB=c2+a2-b22ca⇒32=3b2+a2-b22×3b×a

⇒a2−3ab+2ab2=0⇒(a−2b)(a−b)=0⇒a2-3ab+2ab2=0⇒(a-2b)(a-b)=0

⇒Either a =b⇒A=30∘⇒Either a =b⇒A=30∘

or a= 2b ⇒a2=4b2=b2+c2⇒A=90∘