(tanA/1-cotA)+(cotA/1-tanA) = secAcosecA + 1 prove it
Question
(tanA/1-cotA)+(cotA/1-tanA) = secAcosecA + 1 prove it
Solution
Sure, let's prove the given trigonometric identity step by step.
Given: (tanA/1-cotA)+(cotA/1-tanA) = secAcosecA + 1
Step 1: Convert all the trigonometric ratios to sine and cosine.
So, the given equation becomes:
(sinA/cosA)/(1-cosA/sinA) + (cosA/sinA)/(1-sinA/cosA) = 1/(sinAcosA) + 1
Step 2: Simplify the left-hand side (LHS) of the equation.
This gives us:
(sinA/cosA)(sinA/(sinA-cosA)) + (cosA/sinA)(cosA/(cosA-sinA))
Step 3: Further simplify the LHS.
This gives us:
(sin^2A/(cosA(sinA-cosA))) + (cos^2A/(sinA(cosA-sinA)))
Step 4: Take the LCM and simplify.
This gives us:
(sin^2A - cos^2A) / (cosA(sinA-cosA) - sinA(cosA-sinA))
Step 5: Use the identity sin^2A - cos^2A = -cos(2A) and simplify.
This gives us:
-cos(2A) / (cosA(sinA-cosA) - sinA(cosA-sinA))
Step 6: Simplify the denominator.
This gives us:
-cos(2A) / (cosAsinA - cos^2A - sin^2A + cosAsinA)
Step 7: Use the identity sin^2A + cos^2A = 1 and simplify.
This gives us:
-cos(2A) / (2cosA*sinA - 1)
Step 8: Use the identity 2cosA*sinA = sin(2A) and simplify.
This gives us:
-cos(2A) / (sin(2A) - 1)
Step 9: Multiply and divide by -1.
This gives us:
cos(2A) / (1 - sin(2A))
Step 10: Use the identity cos(2A) = 1 - 2sin^2A and sin(2A) = 2sinAcosA and simplify.
This gives us:
(1 - 2sin^2A) / (1 - 2sinAcosA)
Step 11: Simplify to get the right-hand side (RHS) of the equation.
This gives us:
1/(sinAcosA) + 1
Hence, the given equation is proved.
Similar Questions
cosecA−sinA)(secA−cosA)=1tanA+cotA
prove that cot(2A)=(cotA-tanA)/2
prove that: sec2tita-cos2tita=tan2tita+sin2tita
Verify the identity.cos(u) sec(u)tan(u) = cot(u)Use a Reciprocal Identity to rewrite the expression, and then simplify.cos(u) sec(u)tan(u) = cos(u) sec(u) = cos(u) · 1cos(u) · =
Prove the identity.=tan2x−secx12+secx1−secx1Note that each Statement must be based on a Rule chosen from the Rule menu. To see a detailed description of a Rule, select the More Information Button to the right of the Rule.
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.