secθ + tanθ = 5/2 হলে, secθ - tenθ -এর মান কত ?
Solution
Correct Answer: Option B
দেয়া আছে
secθ + tanθ = 5/2
আমরা জানি,
⇒ sec2θ - tan2θ=1
⇒ (secθ + tanθ)(secθ - tanθ) =1
⇒ (5/2)(secθ - tanθ) =1
∴ secθ - tanθ = 2/5
secθ + tanθ = 5/2
আমরা জানি,
⇒ sec2θ - tan2θ=1
⇒ (secθ + tanθ)(secθ - tanθ) =1
⇒ (5/2)(secθ - tanθ) =1
∴ secθ - tanθ = 2/5
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