Question

In triangle ABC if ab =2bc and angle b=90 then value of secA is..?
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Answer 1

Answer:

Step-by-step explanation:

Correct option is

A

b+c

b−c

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Given ∠B=90  

0

 

∴B−C=A

Thus using above formula, tan(  

2

B−C

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)=  

b+c

b−c

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cot  

2

A

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⇒tan  

2

 

2

A

​

=  

b+c

b−c

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Answer 2

Sec A=

$sec \: a = \frac{ac}{2bc}$

please mark as brainlist answer