0
sin A = -x/y
Since the sine is the ratio of the opposite leg to the hypotenuse, let's assume the opposite leg's length is -x and the hypotenuse's length is y. Let's call the adjacent leg's length z. So:
(-x)2+z2=y2
z2=y2-(-x)2
z2=y2-x2
z=√(y2-x2)
cos A = z/y = √(y2-x2)/y
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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
Prove that cosA-sinA equals 2sinA?
that cannot be proved because it is not necessarily true.
CosA equals a2 plus c2 minus b2 by 2ac what is this formula?
This is known as the Cosine Rule.
How do you find perimeter of triangle whose two sides are given?
You'll have to work out the length of the third side using:a) the sine rule (if information given has one side opposite a given angle and the unknown side also opposite a given angle)SIN RULE: sinA/a = sinB/b = sinC/cb) the cos rule (not opposite).COSINE RULE: a2 = b2 +c2 -2bc x CosA
How can the exact value of sin75 be found using sina plus b equals sinacosb plus cosasinb?
sin75 = sin(45 + 30) = sin45cos30 + cos45sin30 = (1/root 2)((root 3)/2) + (1/root 2)(1/2)
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 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
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
Prove that cosA-sinA equals 2sinA?
that cannot be proved because it is not necessarily true.
What is the value of sin³A-cos³A?
1/4 (3 (sinA - cosA) - (sin3A+cos3A) )
If cosA plus cosB 12 and sinA plus sinB 14 then tan(A2 plus B2)?
1 by 2
CosA equals a2 plus c2 minus b2 by 2ac what is this formula?
This is known as the Cosine Rule.
What is the market cap for Sina Corporation SINA?
As of July 2014, the market cap for Sina Corporation (SINA) is $3,264,806,641.55.
What has the author Sina Hofmann written?
Sina Hofmann has written: 'Sina Hofmann'
What is the symbol for Sina Corporation in NASDAQ?
The symbol for Sina Corporation in NASDAQ is: SINA.
What is the birth name of Sina Amedson?
Sina Amedson's birth name is David Sina Amedson.
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)
