Question

9. cosec A (1 + cos A) (cosec A - cot A) = 1​

Answer 1

Answer:

It is true

Step-by-step explanation:

for example a right angled triangle b that

ab line =6

bc line=8

ac line or hypotenuse=10

then,

cosecA(1+cosA)(cosecA-cotA)=

10/8(1+6/10)(10/8-6/8)=

10/8*16/10*1/2=

2*1/2=1