Krishna
0

Step 1: Understand the question.

NOTE:  Right angle triangle ABC, right angle at C.

So, A and B are complimentary angles.

Step 2: Determine the unknown value

NOTE: If \angle A \text{ and } \angle B  are the acute angles of

a  right triangle,  sin A = cos B

Plugging the known values

x + 0.1 = 2x - 0.4

2x - x = 0.1 + 0.4

x = 0.5