66 Answered Questions for the topic Identities

Identities Trigonometry

04/09/19

tanx+cotx/sec^2x=cotx
how do you verify this
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Identities Trigonometry

11/15/18

trigonometry question
cos^2(pi/8-1/2)Not sure how to go about solving this... is it a cofunction identity or a sum and difference? Help please! Thanks!
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Identities

07/11/18

if cos(-0)=.95 find sin(pi/2-0)
Use identities to find the value of the expression
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Identities

05/12/18

1/(sec(x)-1)(sec(x)+1)=cot^2(x)
verify the identity 
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Identities

02/09/18

Find tan if cos = 1/2 and sin<0 can you explain step by step
I don’t kn how to use the identity in here can u help me
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Identities Verify

01/30/18

Examine the following identity verification: a) identify the error and explain why it is a problem b) correctly verify the identity
tan (θ+ pi/2)= (tan θ + tan pi/2)/(1-tan θ tan pi/2)= (((tanθ)/(tan pi/2))+1)/ ((1/tan pi/2) -tan θ)= (0+1)/ (0-tan θ)= 1/ -tan θ= - cot θ
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Identities

01/30/18

Let z= tan a/2 Show sin a= 2z/1+z2
Let z= tan a/2  Show sin a= 2z/1+z2
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Identities Trigonometry

01/02/18

If sin∅+cos∅=√2,then evaluate:tan∅+cot∅
If Sin∅+cos∅=√2,then evaluate:tan∅+cot∅
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Identities

12/17/17

compress (x-8)squared + (x+8)squared
can u compress (x-8)squared + (x+8)squared
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11/29/17

Verify the identity
A.) sec θ−cos θ/sec θ = sin2θ B.) csc x − sin x = cos x cot x
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Identities

09/10/17

If 2x-6=2/x then (x^2)+(1/x^2)=?
Its options are a)11                             b)3                              c)9                             d)1
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07/30/17

Verifying Trig identity
Hello! I am having some trouble verifying a trig identity   sin(4x)=4cos^3(x)sin(x)-4sin^3(x)cos(x)
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Identities Pre Calculus

04/10/17

Simplify the following trig expression
 Simplify the following trig expression : 1/1-sec x - 1/1+sec x 
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04/09/17

Suppose that cos(t)=-3/5 where t is in the third quadrant. What is cos(2t)?
Can someone walk me through each step with an explanation? please?
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Identities Trigonometry Trig Verify

03/28/17

Prove that these are identities
2cosx - secx = cosx - tanx/cscx
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12/18/16

Trig Identity - Prove Each Identity - Show All Work
prove (1 - cos2x)(1 - tan2x) = sin2x cos2x/1-sin2x   I can't seem to solve this! Halp!!!
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12/14/16

Trig Identity
Prove sin4x = 4 (sin x-2 sin^3 x)/secx   I can't seem to solve this! Halp!!!
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Identities

11/28/16

Identity trig functions
Prove the following identity:   sec (pi/2 - x)=csc x
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07/13/16

sin^5xcos^2=(cos^2x-2cos^4x+cos^6x)sinx
How do you verify the identity?
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Expert Answers •2

05/23/16

Pre cal help please ! Answer asap! Thanks!
prove the following identity.   1-cosθ/sin2θ = 1/1+cosθ   thanks!
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03/21/16

For solutions between 0 and 2pi, solve 2cot^(2)x = 5 - cosec x
I don't find an answer for this question matching the solution, please help me out! I need to get exact values for this, solved by solving the equation.  The range is 0 to 2π Solve 2cot2x = 5 -... more
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03/20/16

Solve 2cot(?^(2))x = 5 - cosec x
I don't find an answer for this question matching the solution, please help me out!  The range is 0 to 2π   Solve 2cot2x = 5 - cosec x
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Identities Cosecond Second

03/20/16

2 questions about proving identities with sec x, cosec x, cot x
I tried several things, but I just don't know how to prove them, nothing worked. Please help me with a detailed way to solve this, please add even the smallest manipulations, I'd be so... more
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02/16/16

Verify the identity - Pre-calculus
Verify the Identity   cot2(x) − tan2(x) = csc2(x) − sec2(x)
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11/30/15

Using algebra to prove identities
Use algebra to prove the identity: cos(x)/1-sin(x) − tan(x) = 1 cos(x)
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