If sec + tan = 5, then what is hte value of sec - tan ?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 1/5.
sec2θ - tan2θ = 1
⇒ (sec θ + tan θ)(sec θ - tan θ) = 1
⇒ 5(sec θ - tan θ) = 1
⇒ sec θ - tan θ = 1/5