Question

In the figure below, it is given that angle C = 90°, AD = DB, ED is perpendicular to AB, AB = 20 units and
AC = 12 units.
7. Area of triangle AEC is
(A) 24 sq. units (B) 21 sq. units
(C) 42 sq. units (D) 21/2 sq.units
8. The value of tan (delta+beta) is
(A) – 117/44
(B) 17/4
(C) 3/4
(D) 5/4
9. The value of cos (alpha+beta) is
(A) 4/5
(B) 3/5
(C) 117/125
(D) –44/125

Answer 1

Answer :

7 . A

8 . D

9 . C

Step-by-step explanation: