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Question 615495: Two forces act on a body at an angle of 100 degrees. The forces are 30 and 40 pounds.
Find magnitude of the resultant force to the nearest tenth and the angle formed by the greater of the two forces and the resultant force to the nearest degree.
I remember learning this in class but totally forgot any sort of equation or such to answer it. Be great if you could point me in the right direction, thanks :)
Click here to see answer by jsmallt9(3296)

Question 615521: Given cosα = 1/2, -pi/2 < α < 0; sinβ=1/3, 0 < β < pi/2. Find cos(α + β)
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Question 615588: On a typical day at an ocean port, the water has a maximum depth of 18m at 6.00 a.m. The maximum depth of 9m occurs 6.8h later. Write an equation of the form h = a cos k(t-p) + q to describe the relationship between the depth of the water and time.
I already determined the parts: a= 4.5, q= 13.5, p= 6 , but I have no idea how to get the k ( in the form of (2π\k).
Could possible give an explanation of how to get the k， please? Thank you~
Click here to see answer by stanbon(57290)

Question 615537: A point on the rim of a wheel has a linear speed of 18 cm/s. If the radius of the wheel is 20 cm, what is the angular speed of the wheel in radians per second?
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Question 615621: which expression is equivalent to sin (-120)
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Question 615576: if sin theta=4/5 and theta terminates on the interval [0, pi/2] find the exact value of tan 2theta
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Question 615813: what is a solution to 8cosx+4=0 in degrees?
a. undefined
b.120*
c. -30*
d. 1*
Click here to see answer by jim_thompson5910(28549)

Question 615794: using periodic function, find the value of sin 17pie
-
3
convert 144degrees int radians
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Question 615765: solve the equation
√3 cscx-2= 0
Solve the equation
tanx+ √3 = 0
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Question 615761: Find all the solution of the equation in the interval (0,2pi)
sec^2x-1=0
&

sinx-2=cosx-2
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Question 615760: find all the solution of the equation in the interval (0,2pi)
tan(x+pi)+2 sin(x+pi)=0
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Question 615675: Find all solutions to the equation.
csc theta-sqroot of 2=0
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Question 615618: verifying identites
csc(x)*cos^2(x)+sin(x)=csc(x)
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Question 615987: How do you find the tan of 165 using double/half angle formulas?
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Question 616202: Find the quadrant (1, 2, 3, or 4) containing the points on the unit circle satisfying the given conditions.
csc(t) > 0
tan(t) > 0
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Question 616096: How do you solve 3r²-6r=-3 using the quadratic formula?
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Question 616291: Simplify 7sin theta sec theta
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Question 616291: Simplify 7sin theta sec theta
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Question 616295: Solve 2tan theta=2cot theta for all values of theta if theta is measured in degrees
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Question 616295: Solve 2tan theta=2cot theta for all values of theta if theta is measured in degrees
Click here to see answer by lwsshak3(6490)

Question 616321: how do you change 0 , 90 , 180 , and 270 into pi numbers on a graph
the question im trying to solve is : graph the equation y=2cosx in the interval 0
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Question 616286: Find the value of cot(cos^-1 2/3)
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Question 616402: What is the period of the function Y= 1/3 sin(π/2-π) ?
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Question 616570: Evaluate the expression
The current i in an alternating-current circuit is given by i=i(m) sin, where i (m) is the maximum current in the circuit. Find i if i(m)=0.0466 A and 0=472.1 degree.
What does i=?
Click here to see answer by Alan3354(30993)

Question 616572: patrick runs in a direction north 60 degrees east and after 45 minutes finds himself 3900 m north of his starting point. what is patrick's speed in minutes per second?
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Question 616705: find the measure of angle x in the interval 180 is greater than or equal to x greater than or equal to 270 that satisfies the equation 2cosx+1=0
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Question 616739:
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Question 616735:
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Question 616716: Find 2 angles and 1 side. 10 is on opposite and 10 is on adjacent. On a right triangle.
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Question 616802: Use the fact that the trigonometric functions are periodic to find the exact value of each expression. Do not use a calculator.
Sin 9pi/4
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Question 616836: Log[5](2x+10-log[5](x)=4
Click here to see answer by nerdybill(6958)

Question 616844: log[4](36)-2log[4](x)=log[4](9)
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Question 616851: which value of x satisfies the equation cos(3x)=sin60*

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Question 616850: a wedged-shaped piece is cut from a circular pizza. the radius of the pizza is 6 inches. the rounded edge of the cust of the piece measuures 4.2 inches. to the nearest tenth the angle of the pointed end of the pizza in radians is ?

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Question 616838: Log[4](36)-2Log[4](X)=Log[6](9)
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Question 613040: find the value of sin x if x is in the standard position and the point (-3,2) lies on its terminal side
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Question 616888: im completely lost on how to work these out,
Given cos A =0.42 and sin B = 0.73 evaluate
(a) sin(A - B)
(b) cos(A - B)
(c) tan(A+B)
to 4 decimal places
Click here to see answer by jsmallt9(3296)

Question 616848: which value of x satisfies the equation cos(3x)=sin60*
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Question 616932: 1. Complete the last step to prove the following identity. Express answer in terms of sin and/or cos only.
cot B sec B=csc B
2. Change this problem to an expression of sin and/or cos only.
tan A - sec A =
3. Complete the last step to prove the following identity. Express answer in terms of tangent and/or cotangent only.
(1+tan^(2)x)/(tan^(2)x)=csc^(2)x
Click here to see answer by solver91311(16877)

Question 616996: Calculate (4+3i)^4. Give your answer in a+bi form. Thank you!
a=?
b=?
Click here to see answer by Alan3354(30993)

Question 617001: Calculate sqrt(3-3i). Give your answer in a+bi form. In polar form, use the angle 0<(theta)<2pi. Thank you!
Click here to see answer by stanbon(57290)

Question 616995: Write the following numbers in the polar form r(cos(theta)+isin(theta)) 0<(theta)<2pi. Thank you!
1) 4i
2) -4+2i
Click here to see answer by jsmallt9(3296)

Question 617071: How to solve tan^3X-3tan^2X-3tanX+1=0?
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Question 617118: Solve the following equations in the interval [0, 2pi].
1) cos(t)= (1/2)
t=
2) cos(t)= -(sqrt2/2)
t=
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