Example 8 If 7 cos A  24
sin A = 0 and A being in the Ist Quadrant. Find the values of tan
A, sec A and csc A.
Solution: 7 cos A  24 sin
A= 0
Example 9
Solution:
TYPE II
Example 1 Find the value of
Solution
Example 2 Prove that
Solution : cot (90^{0}
 A) = tan A,
csc (90^{0}  A) = sec A
... [ cofunction relations]
\ cot (90^{0}
 a) + csc (90^{0}  A) = tan A + sec A
EXAMPLE 3
Solution: csc (90^{0}
 ) = sec
, sin (90^{0}  )
= cos
....[cofunction relations]
and tan (90^{0}  )
= cot
Example 4
Solution:
Example 5 Find the value of
Solution:
\ A is in II Quadrant and IV Quadrant
(by ASTC)
\ csc A = 5/4
Thus we have
Therefore,
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