Precalculus

Precalculus

solve the following trig equation 4(I cos x I)+3=bcos2x if one of the roots is 5Pi/6

Background information: nsin(1/n) diverges using the Test for Divergence. I was playing around on my calculator and I noticed that no matter what term number you use the output...

Angle θ is an angle in standard position and B(-3,4) is a point on the terminal side of the angle. Find the value of sin(θ).

Find the measure of the central angle (in radians) subtended by an arc of length 6 centimeters in a circle of radius 4 centimeters.

I am a 7th grader who is studying for a academic pentathlon competition that is on march.

Two triangles share a common side. The lengths of the sides of the first triangle are in the ratio 5:6:7, while those of the second are in the ratio 4:9:11. If the lengths of all six sides are integers,...

Solve △ABC(Right Triangle) using the given measurements. a = 7, A = 49° 2. A = 22°, c = 8 3. a = 7, c = 16 Please help me understand this please.

In your own words, explain why the method of dividing complex numbers works. What property justifies this process?

The height of a flag waving on top of a flag pole is estimated this way: I measure off a distance of 200 ft from the base of the flag pole, and then measure the angle of elevation of the top of the...

1-2. Roxy and Heaven are standing at the seashore 10 miles apart. The coastline is a straight line between them. Both can see tuhe same ship in the water. The angle between the coastline and the line...

A submarine traveling from the east, fires a torpedo at a ship traveling at a 300° bearing. The torpedo is fired 7.4° north of west. How much faster must the torpedo be traveling than the ship in...

If log2sinx - log2cosx -log2(1-tan^2x) = -1, Then find x. Options : A) (nπ)/2 + π/8, n€Z B) nπ - π/8, n€Z C) (nπ)/4 + π/2, n€Z D) none of these Answer is...

What is the value of sin A?

(cot2 theta + 1) (tan theta)

1. (sec x-1)(sec x+1) = tan2x 2. cot 2θ = cot2 θ-1 -------------...

Answers: 1. 4a^2-a+6 2. 4a^2-a+4 3. 4a^2+7a+6 4. 4a^2+7a+4

A lighthouse is stationed at a point P some distance away from the nearest point Q on a straight shoreline. It is found that the beam of light is moving alon the shore at a rate of 220pi m/s when...

Find the exact value of the trigonometric function at the given real number. 1. a) cos 5pi/3 b) cos (-5pi/3) c) cos 7pi/3 2. a...

Show that the point is on the unit circle 1.) (5/13, 12/13) 2.) (√pi/6, 5/6) Find the terminal point on the unit circle...