A surfer paddles out past breaking waves, rides a wave, paddles back out past the breaking waves, rides another wave back to the
1 answer:
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Answer:
Step-by-step explanation:
Given
The attached triangle
Required
Find cos V
In trigonometry:
In this case:
Where
and
-- Pythagoras
Take square roots
So:
Rationalize:
Answer:
The measurement of EF is 1.98 units
Step-by-step explanation:
In Δ DEF
∵ m∠E = 90°
∴ FD is the hypotenuse of the triangle
∵ m∠D = 26°
∵ EF is opposite to angle D
- We can use the sine ratio to find it
∵ sin D = ⇒ (opposite side / hypotenuse)
∵ FD = 4.5 units
∴ sin(26) =
- Multiply both sides by 4.5
∴ 4.5 sin(26) = EF
∵ sin 26° ≈ 0.44
∴ 4.5(0.44) = EF
∴ 1.98 = EF
The measurement of EF is 1.98 units