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Trigonometric Identities
Page 8
Questions (1,666)
If sinA-sinB=x and cosA+cosB=y than tan(A+B/2) is:
1 answer
asked by
Nirjala
155 views
cot^2 (u/2) = (csc(u) + cot u)/(csc(u) - cot u)
1 answer
asked by
King0ranges
225 views
Sin(180-x) X tan(360-x) X cos(180+x) - 1
1 answer
asked by
Yolanda Ngishe
188 views
(1_ cos ^2)(1_tan^2)=tan^2
7 answers
asked by
Anonymous
220 views
solve:
cos^4(x)-sin^4(x)=cos(2x) cos(4x)=cos^2(x)-sin^2(x)
3 answers
asked by
jennie
309 views
Solve each trig identity.
a) sec2(x) = [sec^2(x)]/[2 - sec^2(x)] b) sec2(x) = [1 + tan^2(x)]/[1 - tan^2(x)] c) [cot(x) -
1 answer
asked by
jennie
312 views
sin(pi+x) cos(pi/2-x) - cos(pi+x) sin(x+3pi/2)
3 answers
asked by
help appreciated
266 views
prove that
(cosx - sinx) / (cosx + sinx) = sec2x - tan2x
3 answers
asked by
urgent
313 views
prove that
sin(pi/2 - x)cot(pi/2 + x) = -sinx
1 answer
asked by
urgent
279 views
prove that
(tanx + tany) / (cotx + coty) = (tanx)(tany)
1 answer
asked by
urgent
293 views
cos(a+b)
1 answer
asked by
Anonymous
150 views
does sin2(x)=2 sinx cosx?
4 answers
asked by
anonymous
304 views
does sin2(x)=sin(2x)?
1 answer
asked by
anonymous
227 views
Prove the trigonometric identity below. Show all steps algebraically
(𝑥sinθ − 𝑦cosθ)^2 + (𝑥cosθ + 𝑦sinθ)^2 =
3 answers
asked by
Howl
293 views
Prove the trigonometric identity below. Show all steps of your algebraic solution for full marks
(x sin (theta) - y cos (theta)
3 answers
asked by
GS
436 views
Prove the trigonometric identity below. Show all steps algebraically
(𝑥sinθ−𝑦cosθ)2 +(𝑥cosθ+𝑦sinθ)2 =𝑥2
5 answers
asked by
aleena
323 views
if tanA/tanB=k,prove that k+1/k-1=sin(A+B)/sin(A+B)
1 answer
asked by
Shruti raut
262 views
If cos x=−4/5, and π<x<3π2, what is sin(x+π/2)?
i really need help...
6 answers
asked by
frog
310 views
What can you do to the equation sin^2(θ)+2θ+cos^2(θ)=1 to get the identity 1+cot^2(θ)=csc 2^(θ)?
There may be more than one
4 answers
asked by
frog
318 views
Choose and use a value for Thea on the interval 0<Thea<pi/2 to show that the equation is an identity. Round your answer to three
1 answer
asked by
Shawn
175 views
Explain why Thea =pi/4 would be an appropriate value to use in order to numerically validate that the given equation is an
1 answer
asked by
Sage
151 views
1-cos(8x)(cos(5x)cos(3x)-sin(3x)sin(5x))=sin^2(8x)
2 answers
asked by
kaur
196 views
2tanx-sin2x÷2sin*2x =tanx
3 answers
asked by
Njabulo
479 views
How can you prove the trigonometric identity 1+2cot^(2)theta +cot^(4)theta =csc^(4)theta step by step?
1 answer
asked by
Anonymous
252 views
Rewrite cot^2〖x/4〗 in terms of cosine without power greater than one. Assume that x is in QI.
1 answer
asked by
Jennie
281 views
Prove: tan(π+4x)=(4 tanx-4 tan^3 x)/(tan^4 x-6 tan^2 x+1)
1 answer
asked by
Mark
269 views
Prove:
1. (cos^2 x-1)^2=(1-2 cos2x+cos^2 2x)/4 2.tan(π+4x)=(4 tanx-4 tan^3 x)/(tan^4 x-6 tan^2 x+1)
2 answers
asked by
Mia
169 views
Given sin A = 3/5, cos B = -24/25, 90° < A < 180°, 180° < B < 270°
Find tan(B - A)
3 answers
asked by
Alex
1,001 views
Evaluate: cosA = 3/5; <A in Quadrant IV, and sinB = -12/13; <A in Quadrant III
1.) sin(A-B) 2.) tan(A+B)
1 answer
asked by
Kirito
263 views
how do you find the exact value tan(x+y), sinx = (3/5) and secy = (-13/5)
1 answer
asked by
nani
281 views
how do you find the exact value sin(x+y), sinx=
5 3 and \sec y=-\frac{13}{5}secy=− 5 13
1 answer
asked by
nani
264 views
How sin(90+x) become -coos(x). What about the 90. Explain.
1 answer
asked by
Anonymous
113 views
cos 75 degrees * cos 15 degrees - sin 75 degrees sin 15 degrees is equivalent to
3 answers
asked by
Aurora
1,984 views
Given:cos(2theta)=7/25, pi <theta<3pi/2 find sin theta
1 answer
asked by
Anonymous
314 views
If x is an acute angle and tanx=3/4 evaluate coax - sinx/coax +sinx
2 answers
asked by
Dido lobo
202 views
4 arctan(1/3)+4 arctan(1/4)+4 arctan(2/9)=pi
how do i prove it but without using this formula arctan(x)+arctan(y) = arctan(
1 answer
asked by
math student
463 views
How would you solve the trigonometric identity (cosx-sinx)/(cosx+sinx)=sec2x-tan2x?
1 answer
asked by
Riley
421 views
How would I find cos(u/2) if sec u =13.465 and u is in Quadrant-IV (assume that 0<u<2π) ?
cos(u/2)=___
2 answers
asked by
Mira
527 views
How do I do this
Need details solution to follow up prove that
1 answer
asked by
Isaac
376 views
If sin x = 1/5 with x in QII , find cos(x/2)
1 answer
asked by
sam
404 views
If sinA=3/5 when pi/2 < A < pi and cosB=5/13 when 3pi/2 < B < 2pi, find the exact value of the function cos(5pi/6+B).
3 answers
asked by
Serein
1,617 views
Can someone help me please? Rewrite the expression so that it is not in fractional form: sin^2 x/1+cos x
1 answer
asked by
Chris
329 views
Sin^2x-cos^2x
4 answers
asked by
Chris
236 views
[Sin^2(theta) - tan(theta) ] / [cos^2(theta) - cot(theta)] = tan^2(theta)
I am supposed to prove that the left side of the
2 answers
asked by
Rosh
494 views
Establish each identity. I would like to check my answers to make sure it's right :) Thank you!
1)
1 answer
asked by
Elli
363 views
Hello, I need help with solving these trig identities. All help is appreciated!
1. Establish the Identity: (cos(2x)/1+sin(2x)) =
3 answers
asked by
Kam
499 views
(secx - tanx)(cscx+1) =cotx
3 answers
asked by
lizbeth
461 views
Verify (csc^2x-1)/cos^2x=csc^2x.
After making (csc^2x-1) into ((1/sin^2x)-1) and cos^2 into 1-sin^2x, what do I do next??
3 answers
asked by
Vena
269 views
Express 1 - 2*cos(2a) as a product
2 answers
asked by
anonymous
461 views
Use fundamental identities and or the complementary angle theorem to find the value of the expression: tan 55°-cos 35°/sin
3 answers
asked by
Ted
1,786 views
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Parent Categories (14)
Algebra
Algebraic Simplification
Basic Trigonometric Functions
Calculus
Cosine and Sine
Functions
Functions and Formulas
Mathematics
Simplifying expressions
Tangent
Tangent Function
Trigonometric Equations
Trigonometric Functions
Trigonometry