1.
In a ΔABC, if 4∠A = 3∠B = 12∠C, find ∠A?

2.
In ΔPQR Measure of angle Q at is 90°. If sinP = $$\frac{{12}}{{13}}$$ and PQ = 1 cm. Then what is the value of cotR =?

3.
If 0 ≤ θ ≤ $$\frac{\pi }{2}$$ and sec2θ + tan2θ = 7, then θ is

4.
In ΔDEF Measure of angle E is 90°. If cosD = $$\frac{5}{{13}}$$ and DE = 1 cm. Then what is Length of side EF?

5.
In ΔDEF Measure of angle E is 90°. If cotD = $$\frac{8}{{15}}$$ and DE = 16 cm. Then what is the Length of side EF?

6.
In circular measure, the value of the angle 11°15' is:

7.
ΔABC is right angle at B. If m∠C = 45°. Then find the value of (cosecA - $$\sqrt 3 $$ ) =?

8.
ΔDEF is right angled at E. If ∠D = 45°, then what is the value of cosecFcotD?

9.
In ΔXYZ Measure of angle Y is 90° if secX = $$\frac{{17}}{8}$$ and XY = 0.8 cm. Then what is Length of side XZ?

10.
The measures of the four angles of a quadrilateral are in the ratio 1 : 2 : 4 : 5. What is the measure the biggest angle?