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# r times Secant theta equals -5

put into polar form

# Before calculators were around, why was it advantageous to use logarithms to calculate roots?

Before calculators were around, why was it advantageous to use logarithms to calculate roots?   Thanks, Bella

# Find the points of intersections for the functions f(x)= x/6 and g(x) = cosx

How can you do this without plugging it into a graphing caculator?

# suppose you have an isosceles triangle

Suppose you have an isosceles triangle, and each of the equal sides has a length of 1 foot. Suppose the angle formed by those two sides is 45 degrees. Then the area of the triangle is ? should be...

# The bearing from city A to city B

The bearing from city A to city B is S 40 degrees E and the bearing from city B to city C is N 25 degrees E. It takes 2.1 hours for a car traveling at 54 miles per hour to go from A to B and...

# how do I figure out how to do a tangent function

graph y = Atan(Bx-c) with y-coordinates on graph 1/4 and 3/4 between consecutive asymptotes -1 and 1

# half angle trigonometry formula

given cos (a)=4/5 and 3pi/2<a<2pi.  Find the exact value of cos (a/2)

# half angle formula

Given sin (a)= 8/9 and pi/2 <a<pi Find the exact value of sin (a/2) do not use decimals  sin (a/2)=?

# use an addition or subtraction formula to simplify the equation

For cos x cos 3x - sin x sin 3x=0 use an addition or subtraction formula to simplify the equation and then find all solutions of the equation in the interval [0, pi)   the answer...

# Use an addition or subtraction formula to write the expression as a trigonometric function of one number:

cos (3pi/7) cos (2pi/21)+ sin (3pi/7) sin (2pi/21)= cos (pi/A)= B/2 A= B=

# this is a half angle problem... let sinx=-1/3 with x in Quadrant III evaluate sinx/2

please I need help I don't know how to solve this!!!!!!

# Solve the equation on the interval?

Trigonometry Equation   6 cos 2 0 = 3   Please I need step by step instruction on how the answers where found.   Thank You for being so Helpfull, Bella...

# well why do we only consider direction cosines... why not direction sines,tans..??

what is the actual use of direction cosines... and wht happens actually when we consider direction cosines..please answer in detail..!

# Find dy/dt?

Find dy/dt, given that y=x^2+4x and x=cos(3t).

# An angle originally measures -5pi/6. It then undergoes 2(5/6) clockwise rotations.

Find an angle between 0 and 2pi that is coterminal with the resulting angle.

# can someone help me with trigonometric equations?

Solve each equation on the interval 0≤θ<2pi tan θ=2 sin θ

# can you help me with trigonometric equations?

cos θ=-sin(-θ) solve each equation on the interval 0≤θ<2Π

# Quarter 1 POW #5

Two cars race around a circular track, in opposite directions, at constant rates. They start at the same position and meet every 30 seconds. If they move in the same direction, they meet every 120...

# 5.If s denotes the length of the arc of a circle of radius r subtended by a central angle ?, find the missing quantity.r = 13.9 inches, ? = 150°, s = ?

please step by step instructions     If s denotes the length of the arc of a circle of radius r subtended by a central angle θ, find the missing quantity.r = 13.9 inches, θ =...

# Given that x =tan 1/2 y,prove the following:

Given that x =tan 1 y , prove that dy =       2                             ...