this question belong to math I confused
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Answer 1) 5
2) 3/4 ^^
harshal2550:
1=c 2=c
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Answer:
Q1 - Option c -5
Q2 Option b 3/4
Step-by-step explanation:
Q1
5 Cot²A - 5 Cosec²A
= 5 ( Cos²A/Sin²A - 1/Sin²A) ( As CotA = CosA/SinA and CosecA = 1/SinA)
= (5/Sin²A) ( Cos²A - 1)
= (5/Sin²A) (-Sin²A) ( as Cos²A + Sin²A = 1 so Cos²A - 1 = -SIn²A)
= - 5
option c
Q 2
CosA = 3/5
Cot A = CosA/SinA
=> CotA = CosA / √(1 - Cos²A)
=> CotA = (3/5) / √(1 - (3/5)²)
=> CotA = (3/5) / {(1/5)√(5²- 3²)
=> CotA = 3 / √(25- 9)
=> CotA = 3 / √(16)
=> CotA = 3 / 4
Option b
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