For the marked triangle \(A\), find the cosine ratio of the complementary angle.

For \(\dfrac{a}{b}\), what is the correct trigonometric ratio that should be used involving angle \(A\) in the given triangle 

For \(\dfrac{b}{c}\), what is the correct trigonometric ratio that should be used involving angle \(A\) in the given triangle

For the following triangle, find \(\sin A\)

In \( \Delta ABC,\,AB=3,\,BC=4,\,AC=5.\)

\( \cos \theta =?\)

In \( \Delta PQR,\,PQ=12,\,RQ=5,\,PR=13.\)

\(\tan (90^\circ - \theta ) =?\)

In \( \Delta ABC,\,AB=10,\,BC=24,\,AC=26.\)

\( (\sin \theta)^2+(\cos \theta)^2 =?\)

In \( \Delta LMN,\,LM=6,\,MN=8,\,LN=10.\)

\( \dfrac{\sin \theta}{\cos \theta}=?\) 

In \( \Delta ABC,\,AB=8,\,BC=15,\,AC=17.\)

\( \sin \theta =?\)