Questions LLC
Login
or
Sign Up
Ask a New Question
Trigonometry
Trigonometric Identities
Angle Addition/Subtraction Formulas
A and B are accute angles with sin A =0.7 and cos B= 0.4. Find sin(A-B)
1 answer
sin (A-B) = sin A cos B - sin B cos A
Do the numbers.
You can
ask a new question
or
answer this question
.
Similar Questions
expres the following as sums and differences of sines or cosines
cos8t * sin2t sin(a+b) = sin(a)cos(b) + cos(a)sin(b) replacing
Top answer:
Trigonometry was not discovered by a single person. Its development spans thousands of years and
Read more.
Reduce the following to the sine or cosine of one angle:
(i) sin145*cos75 - cos145*sin75 (ii) cos35*cos15 - sin35*sin15 Use the
Top answer:
To reduce the given expressions to the sine or cosine of one angle, we can use the trigonometric
Read more.
Given:
cos u = 3/5; 0 < u < pi/2 cos v = 5/13; 3pi/2 < v < 2pi Find: sin (v + u) cos (v - u) tan (v + u) First compute or list
Top answer:
if cos u=3/5 cos v=5/13 then sin u=4/5 and sin v=12/13 then sin(v+u)=sinv cos u+cos v sin u
Read more.
Show that sin(x+pi)=-sinx.
So far, I used the sum formula for sin which is sin(a+b)=sin a cos b+cos a sin b. sin(x+pi)=sin x cos
Top answer:
in(x+pi)=sin x cos pi+cos x sin pi but cosPI=-1, sin PI=0 sin(x+PI)= -sinx
Read more.
it says to verify the following identity, working only on one side:
cotx+tanx=cscx*secx Work the left side. cot x + tan x = cos
Top answer:
Great job figuring it out! It looks like you made a minor mistake in your simplification. Let me
Read more.
I do not understand how to do this problem
((sin^3 A + cos^3 A)/(sin A + cos A) ) = 1 - sin A cos A note that all the trig terms
Top answer:
use graphic techiques in radians I found that it is roughly equal to -.5 sin [ 20.42036^-1(x +
Read more.
Solve the equation for solutions in the interval 0<=theta<2pi
Problem 1. 3cot^2-4csc=1 My attempt: 3(cos^2/sin^2)-4/sin=1
Top answer:
from 3cos^2 Ø -4sinØ =sin^2 Ø , why not replace the cos^2 Ø 3(1 - sin^2 Ø) - 4sinØ - sin^2 Ø
Read more.
Which of the following are true statements? Select all that apply. (1 point) Responses sin 67° = sin 42° cos 25° + cos 42°
Top answer:
- sin 67° = sin 42° cos 25° + cos 42° sin 25° - cos 67° = cos 41° cos 26° + sin 41° sin
Read more.
Find the velocity, v(t), for an object moving along the x-axis if the acceleration, a(t), is a(t) = cos(t) − sin(t) and v(0) =
Top answer:
To find the velocity function, v(t), we need to integrate the given acceleration function, a(t),
Read more.
Find the velocity, v(t), for an object moving along the x-axis if the acceleration, a(t), is a(t) = cos(t) - sin(t) and v(0) =
Top answer:
v(t) = sint + cost + c 0+1+c = 3
Read more.
Related Questions
What are the ratios for sin A and cos A? The diagram is not drawn to scale.
Triangle Description- AB = 29 AC = 20 BC - 21 A. sin
Find complete length of curve r=a sin^3(theta/3).
I have gone thus- (theta written as t) r^2= a^2 sin^6 t/3 and (dr/dt)^2=a^2
A. Find simpler, equivalent expressions for the following. Justify your answers.
(a) sin(180 + è) (b) cos(180 + è) (c) tan(180
Fill in the blank.
To find the area of any triangle, use one of the following three formulas: Area = __________. a) 1/2 bc
Can you please check my work.
A particle is moving with the given data. Find the position of the particle. a(t) = cos(t) + sin(t)
Find the measure of the acute angle x, if :
sin(x)=0.0175; sin(x)=0.5015; cos(x)=0.06814; cos(x)=0.0670. I know that
3. find the four angles that define the fourth root of z1=1+ sqrt3*i
z = 2 * (1/2 + i * sqrt(3)/2) z = 2 * (cos(pi/3 + 2pi * k) +
Given that sin x + sin y = a and cos x + cos y =a, where a not equal to 0, express sin x + cos x in terms of a.
attemp: sin x = a
What are the ratios for sin A and cos A? The diagram is not drawn to scale.
29 20 21 (1 point) 20 • SIn A = 29 COS A = 21|29
State the restrictions on the variables for these trigonometric identities.
a)(1 + 2 sin x cos x)/ (sin x + cos x) = sin x + cos