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Question
Find angle 'x' if :
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Solution
The above figure we have
tan 60° = `(30)/"AD"`
`sqrt(3) = (30)/"AD"`
AD = `(30)/(sqrt(3)`
Again
sin x = `"AD"/(20)`
AD = 20 sin x
Now
20 sin x = `(30)/sqrt(3)`
sin x = `(30)/(20sqrt(3)`
sin x = `sqrt(3)/(2)`
sin x = sin 60°
x = 60°
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