In ∆DEF, Angle E=90°. if sin D=7/25 find
1) Length of DE
2)Tan D
3) Cos D
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In a ΔABC, right angled at B, AB=24 cm, BC=7 cm. Determine
(i) sinA,cosA
(ii) sinC,cosC
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In Δ ABC, B is at right angle.
Given, AB=24cm
BC=7cm
using Pythagoras theorem
AB
2
+BC
2
=AC
2
⇒(24)
2
+(7)
2
=AC
2
⇒AC=
(24
2
)+(7)
2
=
576+49
=
625
⇒AC=25CM
(i)sin A=
AC
BC
=
25
7
cos A=
AC
AB
=
25
24
(ii)sin C=
AC
AB
=
25
24
cos c=
AC
BC
=
25
7
Answered by
1
answers are 1)24,2)7/24 and 3)24/25
solution are shown in picture
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