Question

find A when 3sin^2A-1=2​

Answer 1

Answer:

A = 90°

Step-by-step explanation:

$3sin^2A-1=2$

$3sin^2A=2+1$

$3sin^2A=3$

$sin^2A=\frac{3}{3}$

$sin^2A=1$

$\sqrt{sin^2A}=\sqrt{1}$

$sinA=1$

We know that sin 90° = 1

∴ Comparing sin A = 1 and sin 90° = 1, A = 90°

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