If A is an acute angle.

If A is an acute angle and sec A = , find all other trigonometric ratios of angle A (using trigonometric identities).

Solution:

sec A = (A is an acute angle)
In right ∆ABC
sec A = =
AC = 17, AB = 8

If tan A = , find all other trigonometric ratios of angle A.

Solution:

tan A =
In right ∆ABC,
tan A = =

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