Q. In ΔMNO,o=870 inches, n=550 inches and ∠N=18∘. Find all possible values of ∠O, to the nearest degree.Answer:
Law of Sines Formula: To find the possible values of angle O, 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 three sides and angles in the triangle. The formula is given by:sin(A)a=sin(B)b=sin(C)cwhere a, b, and c are the lengths of the sides, and A, B, and C are the opposite angles. In this case, we have side o (opposite angle O), side n (opposite angle a0), and angle a0. We can set up the ratio for sides o and n:sin(O)o=sin(N)nPlugging in the given values:sin(O)870=sin(18°)550Now we need to solve for a4.
Calculate Sine of Angle N: First, calculate the sine of angle N, which is 18 degrees. We can use a calculator for this:sin(18∘)≈0.30901699...Now we have:sin(O)870≈0.30901699...550Next, we will cross-multiply to solve for sin(O).
Cross-Multiply to Solve: Cross-multiplying gives us:sin(O)≈(870×0.30901699...)/550Now we calculate the right side of the equation.
Calculate Sin(O): Performing the calculation:sin(O)≈(870×0.30901699)/550sin(O)≈268.884763/550sin(O)≈0.4890632...Now we have the approximate value of sin(O).
Find Angle O: To find angle O, we take the inverse sine (arcsin) of the value we found for sin(O):O≈arcsin(0.4890632...)Using a calculator, we find:O≈29.21∘Since we are looking for the value to the nearest degree, we round this to:O≈29∘However, we must consider that there could be another possible value for angle O because the sine function is positive in both the first and second quadrants. To find the second possible value, we subtract our first value from 180∘:180∘−29∘=151∘So the two possible values for angle O are approximately 29∘ and 151∘.
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