3 cot A =4 হলে Sin A এর মান কত?
Created: 4 years ago |
Updated: 3 months ago
best des
3cotA = 4
= > cotA = 4/3
= cot² A = 16/9
আমরা জানি,
cosec²A = 1 + cot²A
= 1 + (16/9)
= (9 + 16)/9
= 25/9
∴ cosecA = ✓(25/9)
= 5/3
= > sinA = 3/5
Md Azizur Rahman
Founder of Satt
আমরা জানি,
Cot A = ভূমি/লম্ব
দেওয়া আছে,
3 cot A = 4
=> cot A = 4/3 = ভূমি/লম্ব
=> ভূমি = 4, লম্ব = 3
=> অতিভুজ2 = 42+32
=> অতিভুজ = 5
আবার, sin A =লম্ব / অতিভুজ = 3/5
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