in ∆abc angle b = 90°, ab =12cm bc = 5 cmfind ac
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Answer:
solution of this question is 13
Answered by
0
Step-by-step explanation:
a right angled triangle
AC
2
= BC
2
+ AB
2
AC
2
= (5)
2
+ (12)
2
AC
2
= 25+ 144
AC
2
= 169= (13)
2
or
AC=
13
Now from figure,
i.cosA=
A C
A B
=
1 3
1 2
ii.cscA=
B C
A C
=
5
13
iii.cosC=
A C
B C
=
13
5
iv.cscC=
A B
A C
=
1 2
1 3
Hence, proved.
Hope it helps you
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