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how to find the missing angle of a triangle using triganometry when the hypotenuse is 12cm and the opposite is 5 c,

 May 16, 2016
 #1
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Use the fact that sin(angle) = opposite/hypotenuse

 

or angle = sin-1(opposite/hypotenuse)

 May 16, 2016
 #2
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\(sin \vartheta = \frac{5}{12}\)

\(\vartheta = sin^{-1}(\frac{5}{12})\)

which is approximately 24.6243°

Therefore, the missing angle is 24.6243° which is about 0.429775 radians (all corr. to 6 sig. fig.)

 May 16, 2016

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