First slide

Properties of ITF

Question

$S e c^{2} (T a n^{- 1} (2)) + C o \sec^{2} (C o t^{- 1} (2)) =$

Very Easy

A

5
B

10
C

15
D

50

Solution

$S e c^{2} (T a n^{- 1} 2) + C o \sec^{2} (C o t^{- 1} 2) = 1 + T a n^{2} (T a n^{- 1} 2) + 1 + C o t^{2} (C o t^{- 1} 2) = 1 + 4 + 1 + 4 = 10$

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