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Nata [24]
3 years ago
14

Complete the identity. sec 0 - sece =? Any one can please help me?

Mathematics
1 answer:
Margaret [11]3 years ago
4 0

Answer:

\frac{\sin^2(\theta)}{\cos(\theta)}

Step-by-step explanation:

\sec(\theta)-\frac{1}{\sec(\theta)}

Write first term as a fraction:

\frac{\sec(\theta)}{1}-\frac{1}{\sec(\theta)}

Multiply first fraction by 1=\frac{\sec(\theta)}{\sec(\theta)}:

\frac{\sec^2(\theta)-1}{\sec(\theta)}

Use Pythagoren Identity, \tan^2(\theta)+1=\sec^2(\theta):

\frac{\tan^2(\theta)}{\sec(\theta)}

Rewrite using quotient identity, \frac{\sin(\theta)}{\cos(\theta)}=\tan(\theta), and recirpocal identity, \frac{1}{\cos(\theta)}=\sec(\theta):

\frac{\frac{\sin^2(\theta)}{\cos^2(\theta)}}{\frac{1}{\cos(\theta)}}

A factor of \frac{1}{\cos(\theta)} cancels:

\frac{\sin^2(\theta)}{\cos(\theta)}

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