Question

If 17cosA=15..find the value of tanA+2SecA

Answer 1

cosA=15/17=Base/hypotenuse
by using pythagorous theorem
(17)^2=(15)^2+p^2
p^2=(17)^2-(15)^2
p^2=289-225
p^2=64
perpendicular =8
now,tanA = perpendicular /base
tanA =8/17
secA =1/cosA=17/15

tanA +2secA =8/17+2×17/15 =698/255