First slide

Trigonometric Identities

Question

$(\sqrt{1 + \tan^{2} 200^{0}}) \cos 200^{0} =$

Moderate

A

$- 1$
B

0
C

1
D

2

Solution

$(\sqrt{1 + \tan^{2} 200^{0}}) \cos 200^{0}$
$= (\sqrt{\sec^{2} 200^{0}}) \cos 200^{0} = - 1$ , $\sin c e, s e c θ i s n e g a t i v e i n 3 r d q u a d r a n t .$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App