Answer:
1/9 yd.
Step-by-step explanation:
2/3 /6= 2/3 /6/1 = 2/3 x 1/6= 2/18=1/9
Answer:
20748
Step-by-step explanation:
546 times 38
Answer:
4+9i
Step-by-step explanation:
Answer:84
Step-by-step explanation:Using proportions, it is found that the height of the lighthouse is of 84 ft.
This question is solved by proportions, using a rule of three.
For a height of 5.25 feet, the shadow is of 8 feet. What is the height when the shadow is of 128 feet?
The rule of three is:
5.25 feet - 8 feet
x feet - 128 feet
Applying cross multiplication:
The height of the lighthouse is of 84 ft.
credit:joaobezerra
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Step-by-step explanation:
cotx +2cotxsinx =0
cotx +2 
× sinx= 0
cotx +2 cosx= 0
+ 2cosx= 0
= 0
cosx +2 cosxsinx= 0
cosx ×(1+ 2sinx)= 0
Hence, either cosx= 0 that is x= 90° or 270°
or 1+ 2sinx = 0 that is sinx= 
i.e. x= 210° or 330°
As, 0° ≤x≤ 180° ∴ x= 90°
