10. From the above figure, cosec C =
2po
A
3
C
B
BC/AC
AB/AC
O AC/AB
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Answered by
2
if triangle is right angled at b then b= 90°
so acc to question
(sec.a)(cosec.c) - (tan.a)(cot.c)/(sin.b)
if angle a is taken into consideration then
sec.a = ac/ab
tan.a = bc/ab
and
sin.b = sin(90°) = 1
so equation becomes
(ac/ab)(cosec.c) - (bc/ab)(cot.c)
now if angle c is taken into consideration
cosec.c = ac/bc
cot.c = ab/bc
so filling values
(ac × ac)/(ab × bc) - (bc × ab)/(ab × bc)
{ (ac^2) - (ab×bc) }/ (ab)(bcl
Answered by
1
AC/AB
cosec=hypotenuse/adjacent
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