First slide

Trigonometric Identities

Question

$\tan^{2} θ + \sec θ = 5 \Rightarrow \sec θ =$

Moderate

A

2
B

0
C

1
D

3

Solution

$\tan^{2} θ + \sec θ = 5, \Rightarrow (S e c^{2} θ - 1) + \sec θ = 5,$
$\Rightarrow S e c^{2} θ + \sec θ - 6 = 0, \sec θ = 2 o r - 3$

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