Answers to a and b?
pretty difficult
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Answered by
2
Answer:
Step-by-step explanation:
1) the angle APB is 90° since AB is a diameter.
2) PB = AB sin 40° = 12 sin 40°
~ 12 × 0.643 = 7.716 cm
grisgris0:
can you elaborate on how abp is 90 degrees, lets say i want angle abp, whats that?
Try my maths questions please . They are great and please if you don't mind , inbox me because I have few doubts .
Answered by
11
Answer:
1) ∠APB = 90°
This is because angle in a semi circle is a right angle .
2) Given :
∠APB = 90° ,
∠PAB = 40° .
We know that :
sin Ф = (side opposite to Ф) / (longest side)
⇒ sin(∠PAB) = PB/12
⇒ sin 40 = PB/12
⇒ PB = 12 sin 40
⇒ PB = 12 × 0.6428 approx.
⇒ PB = 7.7136 approx .
The value of PB ≈ 7.7136 cm.
so in the diagram abp is 50 degrees?
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