Question

In the figure <A= 60°, <B= 90°.

(a) If AC = 12 centimetres, then find AB.​

Answer 1

Answer:

cos60 = 1/2 = B/H

1/2 = AB/12

AB= 6 cm

Answer 2

Answer:

As, <B = 90, <A = 60 and AC = 12

Now In ∆ ABC,

cos 60 = AB / AC

1/2 = AB/12

AB = 6 cm.