For a circle of radius r, an expression that relates the area of a sector to the arc length defined by that sector is A=1/2rl where A is the area of the sector and / is the length of the arc. Explain why this is true and provide an example.

Why will the cosine ratio never be ambiguous within a triangle?

In the circle shown, measure of angle HPL= 1/2( mHL+mJM). True or false?

Solve : 3sine=V3 + sine , for 0° < 0 < 360° A. 60°, 120° В. 45°, 135° С. 30°, 150° D. 30°, 120° O A В Ос

Find the length of the arc of a circle with radius 3.5 cm and central angle 142°. (1 dp)

I'm a bit confused as to how radius = y. May you please clarify?

4. Communication. Explain where the CAST Rule comes from by showing how we can determine that: A) the Sine ratio is positive for angles drawn with terminal arms in the second quadrant, and B) the Tangent ratio is negative for angles drawn in the fourth quadrant.

hi, i asked for the exact using pi in the area and  circ. such as 2(pi) or 34(pi). can you please redo step a