Question

if the unit digit of a prefect square number is 9 then what will be the unit digit of its square roots ​

Answer 1

Step-by-step explanation:

Solution:

We know that,

sec2θ – tan2θ = 1

(sec θ + tan θ) (sec θ – tan θ) = 1

(7) (sec θ – tan θ) = 1 …[sec θ + tan θ = 7; (Given)

∴ sec θ – tan θ = 17

Answer 2

Answer:

Hi

Step-by-step explanation:

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