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https://prnt.sc/qpmahf

 

thank you !

 Jan 18, 2020
 #1
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+3

This is in Quadrant 4    cos and secant will be positive

 

 

sqrt(10^2 + (-4)^2 ) = sqrt116 = 2 sqrt 29    (hypotenuse)

 

Sec = 1/cos =  hyp/adj   =  2 sqrt 29 / 10         sqrt29/5

 Jan 18, 2020
edited by ElectricPavlov  Jan 18, 2020

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