If cosA is equal to

I need to prove that the following is true. Thanks.csc^2(A/2)=2secA/secA-1 Right Side=(2/cosA)/(1/cosA - 1) =
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2. asked by Dirk
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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
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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
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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
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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
Given:cosA= 4/5 0(less than or equal to)A(less than of equal to)90*find sinA, sin2A, cos2A
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2. asked by olivia
3. 529 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
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
Can someone please check my work?Answer the following questions in a complete sentence. 1. ¿Qué es la primera cosa que haces
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2. asked by Larry
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If 1-cosA=5/13, prove that 25sinA(sinA - cosA)
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2. asked by Dipankar
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