ShundaBaker
05.02.2021 •
Mathematics
A rectangle on a digital board is made so that its width varies directly as its length. The current rectangle displayed is shown below. What is the width of a rectangle that is 15 inches long? 12.5 inch long and 5 inch width Write a proportion, cross multiple and divide.
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Ответ:
1
Step-by-step explanation:
(a+b)(a−b)=a²−b²
tan²(θ)+1=sec²(θ)
(sec(θ)+tan(θ))(sec(θ)−tan(θ))
=sec²(θ)−tan²(θ)
=(tan²(θ)+1)−tan²(θ)
=1