RS Aggarwal - Mathematics

Book: RS Aggarwal - Mathematics

Chapter: 4. Inverse Trigonometric Functions

Subject: - Class 12th

Q. No. 29 of Objective Questions

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29

Mark the tick against the correct answer in the following:


To Find: The value of cos()


Let x =


tan x =


tan x = =


We know that by pythagorus theorem ,


(Hypotenuse )2 = (opposite side )2 + (adjacent side )2


Therefore, Hypotenuse = 5


cos x = =


Since here x = hence cos() becomes cos x


Hence , cos() = cos x =

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