In triangle ABC, lengths of sides opposite respective angles are a = 25, b = 45, c = 30, then the value of cos A is:
\( \frac{20}{27} \)
\( \frac{23}{27} \)
\( \frac{25}{27} \)
\( \frac{21}{27} \)
Find the minimum number of straight lines in the following figure.
If the height of a pole is 6\(\sqrt{3}\) metre and the length of its shadow is 6 metre, then the angle of elevation of the sun is:
The intercepts made by the plane 3x − 4y − 2z = 6 with the coordinate axis are:
-2, -\( \frac{3}{2} \), 3
2, \( \frac{3}{2} \), -3
-2, \( \frac{3}{2} \), 3
2, -\( \frac{3}{2} \), -3