Question

if tan thita =8/15 find the value of it cos square thita
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Answer 1

tanθ = perpendicular/base

       = 8/15

So, perpendicular= 8

base= 15

hypotenuse = √8²+15²

                    = √64+225

                   =√289

                   = 17

cosθ= base/hypotenuse

       = 15/17

So, cos²θ = (15/17)²

                = 225/289

(Ans): 225/289