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Basic Mathematics – I
2
2
Notes If sin = sin , then
=
cos2 = cos2
2 = 2n 2 , n I
= n
2
2
Similarly, if cos = cos , then
= n , n I
2
2
Again, if tan = tan , then
=
cos2 = cos2
2 = 2n 2
= n , n I is the general solution.
Example 6: Find the general solution of the following equation:
(a)
2
(b) 4sin = 1
Solution
(a) sin =
tan =
=
(b) 4sin q = 1
2
sin =
=
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