Question
Find the complement of 0.4 times of 130°.

Answer

We know that two angles are called complementary when their sum is 90°. Now
0.4 times of $130^{\circ}=\frac{4}{10} \times 130^{\circ}$
= 4 × 13° = 52°
∴ Its complement will be = 90° - 52° = 38°

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