Krishna
0

Step 1: Note down the given equation and known about the complimentary angles

             EXAMPLE: \cosec 31\degree - \sec 59\degree


Step 2 Using the trigonometric ratio for complementary angles,

              NOTE: we know that, \cosec A = \sec (90\degree - A)


              EXAMPLE:   \cosec 31\degree = \sec (90\degree - 31\degree)

                                   \cosec 31\degree = \sec 59 \degree.............(1)


Step 3: Insert the known values and solve for the unknown value.

               EXAMPLE: = \cosec 31\degree - \sec 59\degree

                                   = \sec59\degree-\sec59\degree [since equation (1)]

                                        = 0