Answer:
A real solution in algebra is simply a solution to an equation that is a real number.
for example
If y>0, then x2 = y has two real solution or roots. x = ±√y
If y=0, then x2 = y has one real solution.
The statement EF=2.GF (Option A) and the statement
(Option C) are true for the ΔEFG.
<h3>What are trigonometric ratios?</h3>
The six trigonometric ratios of a right-angle triangle are Sin, Cos, Tan, Cosec, Sec and Cot. Trigonometric ratios are used to measure the sides of the right triangle.
Given that in ΔEFG, m∠E=30°, m∠F=60° and m∠G=90°.
Wow, sin 30°![=\frac{GF}{EF}](https://tex.z-dn.net/?f=%3D%5Cfrac%7BGF%7D%7BEF%7D)
⇒![\frac{1}{2} =\frac{GF}{EF}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%20%3D%5Cfrac%7BGF%7D%7BEF%7D)
⇒EF=2.GF
and sin 60°![=\frac{GE}{EF}](https://tex.z-dn.net/?f=%3D%5Cfrac%7BGE%7D%7BEF%7D)
⇒![\frac{\sqrt{3} }{2} =\frac{GE}{EF}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Csqrt%7B3%7D%20%7D%7B2%7D%20%3D%5Cfrac%7BGE%7D%7BEF%7D)
⇒![\frac{\sqrt{3} }{2} .EF=GE](https://tex.z-dn.net/?f=%5Cfrac%7B%5Csqrt%7B3%7D%20%7D%7B2%7D%20.EF%3DGE)
Therefore, the statement EF=2.GF (Option A) and the statement
(Option C) are true for the ΔEFG.
To learn more about trigonometric ratios visit:
brainly.com/question/1201366.
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Answer:
20 cm^2
Explanation:
Degree of area you want to find: 80
Length of radius: 9
Equation: 80/360 times 9
80/360= .2222222...
.2222222... times 9 = 20
So the answer is 20 cm^2