Answer:
5i
Step-by-step explanation:
Using the rule of radicals
×
⇔
and = i
Given
=
= ×
×
= 5 × × i
= 5i
Find all solutions to the following equation without a calculator: 2secx+2tanx=2. Step by Step
1 answer:
Answer:
At every 360°
EG. -360, 0, 360...
Step-by-step explanation:
SEE ATTACHMENT
Simplify the equation by dividing by 2.
Convert the equation so both terms have the same denominator - cos(x).
Multiply both sides by cos(x).
Looking at the graphs, where the top one is y = sin(x) and the bottom is y = cos(x), you can see that at every 360°, 1 + sin(x) = cos(x)
EG
1 + sin(-360) = cos(-360)
1 + 0 = 1
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Given:
Height of right triangle = 9 mi
Hypotenuse = 17.5 mi
Base of right triangle = Distance across lake
To find:
The distance across the lake.
Solution:
Using Pythagoras theorem:
In right triangle, square of the hypotenuse is equal to the sum of the squares of the other two sides.
Subtract 81 from both sides.
Taking square root on both sides.
⇒ base = 15
The distance across the lake 15 mi.