If 15Cot=8, find (1+SinA)(1-SinA)/(1+CosA)(1-CosA)

Hi, can someone give me the answer to this question:secA-tanA=1/4. Find cosA I got: CosA=4(1-sinA) Is my answer good? Now
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2. asked by Shym
3. 925 views
Hello I am having trouble with proving this:sinA/secA+secA/cscA = tan(A)(2-sin^2(A)) So far I've gotten SinA/(1/cosA) +
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2. asked by Jimbo
3. 798 views
If 15Cot=8, find (1+SinA)(1-SinA)/(1+CosA)(1-CosA)
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2. asked by Kavya
3. 966 views
Prove that [sinA/(1-cosA)-(1-cosA)/sinA]*[cosA/(1+sinA)+(1+sinA)/cosA]=4cosecAI the second part as 2 secA
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2. asked by Agastya
3. 733 views
Let P=(cosA sinA)(sinA cosA) Q=(cosB sinA) (sinB cosA) show that PQ=(cosA(A-B) sin(A B)) (sinA(A B) cos(A-B))
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2. asked by James
3. 715 views
Given that sinA=2/5 and that A is obtuse,find the value of cosA.👍 0 👎 0 👁 25 asked by Raj yesterday at 4:18am sinA =
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2. asked by Raj
3. 1,206 views
CosA/1+sinA=1-sinA/cosAI have to prove the identity each side has to b the same how would i do that? I have a unit test on
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2. asked by Kristien
3. 621 views
I need to count this:a) 1-tg^2a/1+ctg^2a, when sina =2/3 b) 1-tg^2a/1-ctg^2a, when cosa= -1/3 c) tga * cos^2a, when sina +
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2. asked by Evelina
3. 612 views
Establish the following identity: CosA/1-TanA + SinA/1-CotA = CosA-SinA
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2. asked by uche
3. 583 views
Find angle A if it is greater than or equal to 0 degrees and smaller than or equal to 180 degrees. round to the nearest tenth of
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2. asked by Jiskha lover:D
3. 707 views