Question

82. A ladder rests against a wall and is inclined to the horizontal at
an angle whose sine is 4/5. If the ladder reaches 20 metres up the
wall, find the length of the ladder.​

Answer 1

Answer:

25

Step-by-step explanation:

Sine= opp/hyp, so in 4/5, 4 is opp. Given opp is 20, 5 times 4, so hyp is ladder, it'd be 25.