Two mark example problem I — task. Mathematics State Board, Class 10.

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Calculate the size of \(\angle BAC\) in the given triangles. (\(tan \ 38.7^{\circ} = 0.8011\), \(tan \ 69.4^{\circ} = 2.6604\))

Answer:

The size of \(\angle BAC\) in the figure (a) is

i °

The size of \(\angle BAC\) in the figure (b) is

i °

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7. Two mark example problem I