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If A lies in the third quadrant, and 20t...

If A lies in the third quadrant, and 20tanA = 21, then the value of `(5 sin A-2 cos A)/(4cosA-5/7 sinA)` is:
यदि A तीसरे चतुर्थाश में स्थित है तथा 20tanA= 21 है, तो `(5 sin A-2 cos A)/(4cosA-5/7 sinA)` का मान क्या होगा ?

A

`13/12`

B

1

C

`-65/29`

D

`5/29`

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