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In 
/_\FGH,g=190cm,f=900cm and 
/_F=27^(@). Find all possible values of 
/_G, to the nearest 1oth of a degree.
Answer:

In FGH,g=190 cm,f=900 cm \triangle \mathrm{FGH}, g=190 \mathrm{~cm}, f=900 \mathrm{~cm} and F=27 \angle \mathrm{F}=27^{\circ} . Find all possible values of G \angle \mathrm{G} , to the nearest 1010th of a degree.\newlineAnswer:

Full solution

Q. In FGH,g=190 cm,f=900 cm \triangle \mathrm{FGH}, g=190 \mathrm{~cm}, f=900 \mathrm{~cm} and F=27 \angle \mathrm{F}=27^{\circ} . Find all possible values of G \angle \mathrm{G} , to the nearest 1010th of a degree.\newlineAnswer:
  1. Law of Sines Formula: To find the possible values of angle G, we can use the Law of Sines, which states that the ratio of the length of a side of a triangle to the sine of the opposite angle is constant for all sides and angles in the triangle. The formula is:\newlineasin(A)=bsin(B)=csin(C) \frac{a}{\sin(A)} = \frac{b}{\sin(B)} = \frac{c}{\sin(C)} \newlinewhere a,b,c a, b, c are the lengths of the sides, and A,B,C A, B, C are the opposite angles.
  2. Calculate Sine of Angle F: First, we need to find the sine of angle F, which is given as 2727 degrees. We can use a calculator to find this value.\newlinesin(27)0.4540 \sin(27^\circ) \approx 0.4540
  3. Set Up Ratio with Law of Sines: Now, we can set up the ratio using the Law of Sines with the given sides g and f, and the known angle F.\newlinefsin(F)=gsin(G) \frac{f}{\sin(F)} = \frac{g}{\sin(G)} \newline900sin(27)=190sin(G) \frac{900}{\sin(27^\circ)} = \frac{190}{\sin(G)}
  4. Solve for Sine of Angle G: Next, we solve for sin(G) \sin(G) .\newlinesin(G)=190sin(27)900 \sin(G) = \frac{190 \cdot \sin(27^\circ)}{900} \newlinesin(G)1900.4540900 \sin(G) \approx \frac{190 \cdot 0.4540}{900} \newlinesin(G)86.26900 \sin(G) \approx \frac{86.26}{900} \newlinesin(G)0.09584 \sin(G) \approx 0.09584
  5. Find Angle G using Inverse Sine: To find angle G, we take the inverse sine (arcsin) of sin(G) \sin(G) .\newlineGarcsin(0.09584) G \approx \arcsin(0.09584) \newlineUsing a calculator, we find that:\newlineG5.5 G \approx 5.5^\circ
  6. Check Second Possible Value for Angle G: However, since the sine function is positive in both the first and second quadrants, there could be another possible value for angle G in the second quadrant. To find this, we use the fact that sin(180G)=sin(G) \sin(180^\circ - G) = \sin(G) .\newline180G1805.5 180^\circ - G \approx 180^\circ - 5.5^\circ \newline180G174.5 180^\circ - G \approx 174.5^\circ
  7. Validate Valid Solution for Angle G: We must check if this second possible value for angle G is valid in the context of a triangle. The sum of angles in any triangle is 180180 degrees. Since we already have angle F as 2727 degrees, the sum of angles G and the third angle H must be 18027=153 180^\circ - 27^\circ = 153^\circ . If angle G were 174174.55 degrees, the sum of angles G and H would exceed 180180 degrees, which is not possible in a triangle. Therefore, the only valid solution for angle G is the one in the first quadrant.

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