tanθ.cosecθ = কত?
A
secθ
B
sinθ
C
cosθ
D
cosecθ
উত্তরের বিবরণ
সমাধান:
আমরা জানি,
tanθ = sinθ/cosθ
এবং cosecθ = 1/sinθ
∴ tanθ.cosecθ
= (sinθ/cosθ) × (1/sinθ)
= sinθ/(cosθ.sinθ)
= 1/cosθ
= secθ
0
Updated: 1 month ago
sinθ = 3/5 হলে, tanθ এর মান কত?
Created: 2 months ago
A
1/3
B
4/3
C
5/4
D
3/4
0
Updated: 2 months ago
sin45° = √2A হলে, A = কত?
Created: 1 month ago
A
2
B
1/2
C
2/3
D
1/3
সমাধান:
দেওয়া আছে,
sin45° = √2A
⇒ 1/√2 = √2A
∴ A = 1/2
0
Updated: 1 month ago
A = 45° হলে, (1 - tan2A)/(1 + tan2A) = কত?
Created: 1 month ago
A
1/2
B
2
C
1
D
0
সমাধান:
(1 - tan2A)/(1 + tan2A)
= {1 - (tan45°)2}/{1 + (tan45°)2}
= {1 - (1)2}/{1 + (1)2}
= (1 - 1)/(1 + 1)
= 0/2
= 0
0
Updated: 1 month ago
