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What is the right answer for question 20) ? http://postimg.org/image/7ks146rsf/

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lkballer24 | Student, Grade 11 | Valedictorian

Posted August 21, 2013 at 4:16 PM via web

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What is the right answer for question 20) ?

http://postimg.org/image/7ks146rsf/

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llltkl | College Teacher | Valedictorian

Posted August 21, 2013 at 4:34 PM (Answer #1)

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Secant of angle A=AB/AC

From the Pythagoras theorem, AC=`sqrt(15^2-9^2)`

`=sqrt(225-81)`

`=12`

Hence, secant of angle A=15/12

Therefore, the right choice is option a).

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