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Q: If cosA plus cosB 12 and sinA plus sinB 14 then tan(A2 plus B2)?
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What is CosA-SinA?

Sin^2 - Cos^2 = 1 {By the Identity}Therefore (SinA-CosA)(SinA+CosA) = 1SinA-CosA = 1/(SinA+CosA)Therefore CosA-SinA = -1/(SinA+CosA)


If cosecA plus cotA equals 11by2 then find the value of tanA?

CosecA + CotA = 11/2Cosec2A - Cot2A = 1 {By the Identity}(CosecA + CotA) (CosecA - CotA) = 111/2 (CosecA - CotA) = 1(1/SinA) - (CosA/SinA) =2/11(1 - CosA) / SinA = 2/11Therefore 1 - CosA = 2CosA = 3 and SinA = 11Therefore TanA = SinA / CosA = 11/3


If SecASinA equals 0 then what will be the Value of CosA?

secA(sinA)=0 (1/cosA)(sinA)=0 tanA=0 Therefore A is in 1st or 3rd Quadrant i.e A=0 Degrees, 180 Degrees.... This yields cosA=1 or cosA=-1


What is the value of sin³A-cos³A?

1/4 (3 (sinA - cosA) - (sin3A+cos3A) )


Prove that cosA-sinA equals 2sinA?

that cannot be proved because it is not necessarily true.


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The symbol for Sina Corporation in NASDAQ is: SINA.


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Sina Amedson's birth name is David Sina Amedson.


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If sinA equals 1 by 3 evaluate cosA cosecA plus tanA secA?

SinA = 1/3 = Opposite/HypotenuseTherefore taking Opposite to be 1cm and Hypotenuse to be 3cm.Therefore Adjacent side = Root of 32 - 12= root 8CosA = Adjacent/Hypotenuse = root8 / 3CosecA = Hypotenuse/Opposite = 3/1TanA = Opposite/Adjacent = 1 / root8SecA = Hypotenuse/Adjacent = 3 / root8Therefore,(CosA.CosecA) + (TanA.SecA) = (root8 / 3 . 3 / 1) + (1 / root8 . 3 / root8)= (root8) + (3 / 8)= 2(root2) + (3 / 8)


Why are there two sine cosine and tangent ratios?

There aren't. There are three: Sine, Cosine and Tangent, for any given right-angled triangle. They are related of course: for any given angle A, sinA/cosA = tanA; sinA + cosA =1. As you can prove for yourself, the first by a little algebraic manipulation of the basic ratios for a right-angled triangle, the second by looking up the values for any value such that 0 < A < 90. And those three little division sums are the basis for a huge field of mathematics extending far beyond simple triangles into such fields as harmonic analysis, vectors, electricity & electronics, etc.