Question

4.
If cos A=
s,
then find the value of tan A.
​

Answer 1

Given,

cos

−1

(

x

1

)=θ

or, x=secθ

or, x

2

−1=tan

2

θ [ Since sec

2

θ−tan

2

θ=1]

or,

x

2

−1

=tanθ.

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Answer 2

Step-by-step explanation:

Hence, tanA = (root s²+1)/s