Trigonometric identities and formulas

Welcome to the "Trigonometric Identities and Formulas" category on Questions LLC! This category is dedicated to helping you unravel the mysteries of trigonometry and master its intricate identities and formulas. Whether you're a math enthusiast, a student studying for an upcoming test, or simply curious to expand your knowledge, you've come to the right place. Explore a wide range of questions and answers that will empower you to navigate the world of trigonometric identities and formulas with confidence. From fundamental concepts to advanced techniques, our community of experts is here to assist you. So, dive in and unlock the secrets of trigonometry!

Questions (18)

If sin x = 2/3 and cos y = 3/4, find the exact value of sin ( x + y ).
1. 4 answers
2. asked by Fred
3. 1,439 views
1. Given Sin(A) = ⅗ and Cos(B) = 8/17 in Quadrant I, find Sin(A+B).a) 24/80 [b)] 84/85 c) 60/80 d) 60/85 Find Cos(A+B). a)
1. 4 answers
2. asked by Lyss
3. 3,552 views
if cos x=2/3 and x is in quadrant 4 find tan(x/2),sin(x/2),and cos(x/2)i got sin(x/2)=squr 1/6 tan(x/2)=squr 2/6 cos(x/2)=squr
1. 3 answers
2. asked by Ryan
3. 2,458 views
If tan⁡ x=√3, and 180°<x<270°, what is sin⁡(x−210°)?still don't quite get it...
1. 5 answers
2. asked by frog
3. 314 views
Let sinx = 2/3 , with x in quadrant II and cosy = 3/5, with y in quadrant IV. Find tan(2x)Find sin(y/2) Find cos(x -y) find
1. 1 answer
2. asked by Adam
3. 265 views
Write 3theta - sin 4theta as a product.
1. 2 answers
2. asked by Sade
3. 583 views
Suppose that Cot(theta) = c and 0<theta<pi/2.what is a formula for tan (theta) in terms of c? Cot = 1/tan I know that, but I
1. 3 answers
2. asked by Greg
3. 1,854 views
how do you work find sin (a-B)beta sign. sin a = 12/13,a lies in quadrant II,and cos B = 15/17, B lies in quadrant I.
1. 3 answers
2. asked by Kenneth
3. 2,301 views
given tanθ= -2√10/3 and π/2<θ< π find:sin2θ tan θ/2 given sinθ=-5/13 and π<θ<3π/2 find sin2θ cos( θ-4π/3)
1. 1 answer
2. asked by Yulieth
3. 353 views
tanθ= -2sqrt10/3 and π/2<θ< π finda. cos(-θ) b. cos(11π/6 - θ) c.sin2θ d.tanθ/2 can some please explain to me how to
1. 1 answer
2. asked by Yulieth
3. 433 views
hey can somebody help me , its like a hundred questions, im helping my cousin doing it...lolcos=sin60 sin=cos45 tan=1/tan30
1. 2 answers
2. asked by LUKPING
3. 502 views
Use the half-angle formula to find the exact value of cos(x/2) when tanx = -5/8 and x is in quadrant IV. (| is a radical)==> I
1. 1 answer
2. asked by Emily
3. 459 views
How do you find the exact values of sin(u/2), cos(u/2), and tan(u/2) of tan(u)=-5/8
1. 1 answer
2. asked by Kyler
3. 394 views
write the expression sin4xsin5x as a sum or difference of trigonometric functions
1. 1 answer
2. asked by sam
3. 421 views
expres the following as sums and differences of sines or cosinescos8t * sin2t sin(a+b) = sin(a)cos(b) + cos(a)sin(b) replacing
1. 3 answers
2. asked by Pablo
3. 1,428 views
Can someone please check my answers!2. Find value of cos(255degrees)cos(105degrees) root3 - 2 / 4 3. cos(pi/12) - cos(5pi/12) Is
1. 6 answers
2. asked by mysterychicken
3. 673 views
tan(180-x)sin(360-x)cos90-x)cos(-x)/sin(x-180)cos(450+x)tan(180-x)
1. 1 answer
2. asked by shane
3. 484 views
22. If5 3 ,cos 13 5 sin  u  v  and u and v lie in QII, find the exact value of: a) sinu  v b) cosu  v
1. 1 answer
2. asked anonymously
3. 22 views