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:

1 (1).png

The size of

$\angle BAC$ in the figure (a) is

$i °$ .

2 (1).png

The size of

$\angle BAC$ in the figure (b) is

$i °$ .

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