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Can someone help and explain
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Can someone help and explain

Can someone help and explain-example-1
User Lhahne
by
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1 Answer

0 votes

Answer:

∠ A ≈ 43.1°

Explanation:

Using the Sine rule in Δ ABC , that is


(a)/(sinA) =
(c)/(sinC) , substitute values


(20)/(sinA) =
(29)/(sin82) ( cross- multiply )

29 × sinA = 20 × sin82 ( divide both sides by 29 )

sinA =
(20sin82)/(29) , thus

∠ A =
sin^(-1) (
(20sin82)/(29) ) ≈ 43.1° ( to 1 dec. place )

User MIkka Marmik
by
8.0k points
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