Find the value of X if \(cos x = \frac{5}{8}\) for \(0^o\le X\le 180^o\)
141.3o
128.7o
51.3o
48.7o
38.7o
Correct answer is C
No explanation has been provided for this answer.
In \(sin(X+30)^o=cos40^o\),find X
10o
20o
50o
60o
90o
Correct answer is B
\(sin(X+30)^o=cos40^o\\
X+30+40=90^o\)complementary angles
\(X=20^o\)
In the diagram, PQ||SR. Find the value of Z
30o
40o
45o
90o
120o
Correct answer is D
Given PQ//SR
x = 45º
y = 45º
z = ?
Sum of angles in a triangle = 180º
(x + y + z)º = 180º
(45 + 45 + z)º = 180º
90º + zº = 180º
z = (180 - 90)º
z = 90º
In ∆PQR. ∠PQR is a right angle. |QR| = 2cm and ∠PRQ = 60o. Find |PR|
4√3cm
4cm
2√3cm
\(\frac{4}{3}cm\)
1cm
Correct answer is B
No explanation has been provided for this answer.
\(\frac{5}{25}\)
\(\frac{7}{20}\)
\(\frac{3}{5}\)
\(\frac{2}{3}\)
\(\frac{5}{6}\)
Correct answer is C
No explanation has been provided for this answer.
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