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Popular Trigonometry >

prove 2(sec(x)cot(x))=2csc(x)

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Solution

prove 2(sec(x)cot(x))=2csc(x)

Solution

True
Solution steps
2sec(x)cot(x)=2csc(x)
Manipulating left side2sec(x)cot(x)
Express with sin, cos
2cot(x)sec(x)
Use the basic trigonometric identity: cot(x)=sin(x)cos(x)​=2⋅sin(x)cos(x)​sec(x)
Use the basic trigonometric identity: sec(x)=cos(x)1​=2⋅sin(x)cos(x)​⋅cos(x)1​
Simplify 2⋅sin(x)cos(x)​⋅cos(x)1​:sin(x)2​
2⋅sin(x)cos(x)​⋅cos(x)1​
Multiply fractions: a⋅cb​⋅ed​=c⋅ea⋅b⋅d​=sin(x)cos(x)cos(x)⋅1⋅2​
Cancel the common factor: cos(x)=sin(x)1⋅2​
Multiply the numbers: 1⋅2=2=sin(x)2​
=sin(x)2​
=sin(x)2​
Rewrite using trig identities
Use the basic trigonometric identity: sin(x)=csc(x)1​csc(x)1​2​
Simplify
csc(x)1​2​
Apply the fraction rule: cb​a​=ba⋅c​=12csc(x)​
Apply rule 1a​=a=2csc(x)
2csc(x)
2csc(x)
We showed that the two sides could take the same form⇒True

Popular Examples

prove sec^2(x)= 2/((1+cos^2(x)))prove (1+tan^2(x))/(cot^2(x)-1)=tan^2(x)prove cos(2A)=2cos^2(A)-2prove (sec^2(x)-1)cot^2(x)=1prove cos(x)=-1/2

Frequently Asked Questions (FAQ)

  • Is 2(sec(x)cot(x))=2csc(x) ?

    The answer to whether 2(sec(x)cot(x))=2csc(x) is True
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