Find the angle `theta` whose cosine is equal to its tangent.

The angle theta whose cosine is equal to its tangent is given by

Find an angle theta , whose rate of increase is twice as the rate of decrease of its cosine.

In what quadrant does an angle lie if (a) its sine is positive and its cosine is negative ? (b) Its tangent positive and its sine is negative ? (c ) its cosine is positive and its tangent is negative ? (d) its sine is negative and its cosine is positive ?

Find the angle between the vectors whose direction cosines are proportional to 2,3,-6 and 3,-4,5.

Find the angle between the vectors whose direction cosines are proportional to 2,3,-6 and 3,-4,5

Find an angle theta , which increases twice as fast as its cosine.

The direction cosines of the lines bisecting the angle between the lines whose direction cosines are l_(1),m_(1),n_(1) and l_(2),m_(2),n_(2) and the angle between these lines is theta, are

The direction cosines of the lines bisecting the angle between the lines whose direction cosines are I_(1),m_(1),n_(1) and I_(2),m_(2),n_(2) and the angle between these lines is theta ,are

The direction cosines of the lines bisecting the angle between the line whose direction cosines are l_1, m_1, n_1 and l_2, m_2, n_2 and the angle between these lines is theta , are