হলে এর মান কত?
Created: 4 years ago |
Updated: 3 years ago
best des
= > {(sin θ + cos θ)/(sin θ — cos θ)} = 7
= > {(sin θ + cos θ + sin θ — cos θ)/(sin θ + cos θ — sin θ + cos θ)} = {(7 + 1)/(7 - 1)}
= > {(2 sin θ)/(2 cos θ)} = (8/6)
= > tan θ = (4/3)
= > tan² θ = (16/9)
আবার, sec²θ = 1 + tan²θ
= 1 + (16/9)
= (9 + 16)/9
= 25/9
∴sec θ = ✓(25/9)
= ± (5/9)
Md Azizur Rahman
Founder of Satt
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