Test 16
1.
\(a=\cos\left(-\samefrac{63\pi}{5}\right)\)
\(b=\cot\left(-\samefrac{71\pi}{5}\right)\)
\(c=\sec\left(-\samefrac{32\pi}{5}\right)\)
What are the signs respectively?
A) \(+,-,-\)B) \(-,-,+\)C) \(-,-,-\)D) \(+,-,+\)E) \(+,+,+\)
2.
\(x=\sin14^\circ\)
\(y=\sin28^\circ\)
\(z=\cos35^\circ\)
Which ordering is correct?
A) \(z<y<x\)B) \(z<x<y\)C) \(y<x<z\)D) \(x<y<z\)E) \(x<z<y\)
3.
\(a=\cos20^\circ\)
\(b=\sin20^\circ\)
\(c=\tan20^\circ\)
Which ordering is correct?
A) \(c<b<a\)B) \(a<c<b\)C) \(a<b<c\)D) \(b<c<a\)E) \(b<a<c\)
4.
\(a=\cos20^\circ\)
\(b=\cos550^\circ\)
\(c=\sin560^\circ\)
Which ordering is correct?
A) \(b<c<a\)B) \(b<a<c\)C) \(c<b<a\)D) \(c<a<b\)E) \(a<b<c\)
5.
\(k=\cos160^\circ\)
\(m=\sin610^\circ\)
\(n=\tan610^\circ\)
Which ordering is correct?
A) \(k<m=n\)B) \(k<n<m\)C) \(k<m<n\)D) \(m=k<n\)E) \(m<k<n\)
6.
\(a=\sin30^\circ\)
\(b=\sin150^\circ\)
\(c=\cos150^\circ\)
Which ordering is correct?
A) \(a=b=c\)B) \(b=c<a\)C) \(c<a=b\)D) \(c<a<b\)E) \(c<b<a\)
7.
\(a=\sin15^\circ\)
\(b=\cos70^\circ\)
\(c=\tan45^\circ\)
Which ordering is correct?
A) \(b<a<c\)B) \(c<a<b\)C) \(b<c<a\)D) \(a<b<c\)E) \(a<c<b\)
8.
\(a=\cos20^\circ\)
\(b=\sin130^\circ\)
\(c=\tan130^\circ\)
Which ordering is correct?
A) \(a<c<b\)B) \(c<b<a\)C) \(c<a<b\)D) \(b<c<a\)E) \(a<b<c\)