Question

In the adjoining diagram, BD = 6 units, CD = 8 units, AC = 12.5 units, angle ABC = 90° and angle BDC = 90°. Calculate:
(a) sin x
(b) tan y
(c) cos x - sin y.​

Answer 1

Answer:

Correct option is

A

12

△ ABC is a right-angled triangle.

By Pythagoras theorem,

AC

2

=BC

2

+AB

2

⇒13

2

=5

2

+AB

2

⇒AB

2

=−(5)

2

+13

2

⇒AB

2

=−25+169

⇒AB

2

=144

⇒AB=

144

⇒AB=12 cm.

PLEASE MARK ME AS BRAINLIST