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This is the Trig. Identity .
Sin( A + B) = SinACosB + CosASinB.
Hence
Sin55Cos35 + Cos555Sin35 =
Sin(55 + 35) = Sin(90) = 1
Verification
If you take the various Sin & Cos values and multiply then add, they will answer to '1'.
Hence./
(0.819153..)(0.819152...) +(0.573576...)(0,573586...) =
0.67100999 + 0.328989 = 0.99995... ~ 1. as required.
What else can I help you with?
What direction is ENE plus 90 degrees?
ENE plus 90 degrees (clockwise) is SSE.
What angle is 366 degrees?
366 degrees is ONE complete rotation plus 6 degrees of a second rotation.
In a parallelogram solve for x 7x plus 33 degrees and 11X plus 21 degrees?
1) x=21 2) x=14.45
What direction is NNW plus 90 degrees?
The direction NNW plus 90 degrees is ENE. ---------------------- NW is a bearing of 315 and NNW is a bearing of 337.5. Add 90 to this, and subtract 360 because we have "gone round": 337.5 + 90 = 427.5; 427.5 - 360 = 67.5. This is past NE, so the answer is ENE.
In a triangle If a and b is 85 degrees what is c?
The inside angles of a triangle always add up to 180 degrees.If you mean angle a plus angle b equal 85 degrees, then angle c must be 95 degrees.If you mean angle a is 85 degrees and angle b is also 85 degrees, then angle c must be 10 degrees50 degrees :)
Do the equations sine plus cosine and sine squared plus cosine squared both equal 1?
No, they do not.
What is cosine squared theta equal to'?
Cosine squared theta = 1 + Sine squared theta
Sine plus cosine equals?
There is no real significance to sine plus cosine, now sin2(x) + cos2(x) = 1 for any x, where sin2(x) means to take the sign of the number, then square that value.
What is the exact value of cosine of pie over 6 plus sine of pie over 3?
dhasdhdsad
CosA equals a2 plus c2 minus b2 by 2ac what is this formula?
This is known as the Cosine Rule.
Show that sin ²A plus Cos ²A equals 1?
One definition of sine and cosine is with a unitary circle. In this case, the sine is simply equal to the y-coordinate, and the cosine, the x-coordinate. Since the hypothenuse is 1, the equation in the question follows directly from Pythagoras' Law: x2 + y2 = r2, x2 + y2 = 1, cos2A + sin2A = 1. You can also derive it from the alternative definition of sine and cosine (ratios in a right triangle).
Cos x equals -cos x plus 1?
No, but cos(-x) = cos(x), because the cosine function is an even function.
What rhymes with cosign?
cosine plus use an "oh" ending word followed by the word "sign" e.g. go/no/slow/ sign Trust Me it is real
How do you find sec on TI-83 Plus?
There isn't a sec key on the TI-83 Plus. Secant is 1/cosine, which is what is used to find secant on a TI-83 Plus. For example, to find the secant of 4, enter 1/sec(4).
What are the zeros in sine and cosine function?
A "zero of a function" is a point where the dependent value (usually, Y) is zero. In the function f(x) = x2 - 2, for example, there are zeroes at -1.414 and +1.414.The zeroes of the sine function are at all integer multiples of pi, i.e. 0, pi, 2pi, 3pi, etc. The zeroes of the cosine function are at the same points plus pi/2, i.e. pi/2, 3pi/2, 5pi/2, etc.Another way to look at this is that the zeroes of sine are the even multiples of pi/2, and the zeros of cosine are the odd multiples of pi/2.
Where is cos2 on a ti-83 plus calculator?
There is not cos2 button on a TI-83 plus. You will need to enter the cosine function and then square it. (Press the x2 button to get the squared function.) To type cos2(90) on a TI-83 plus, for example, type: cos(90)2
What is the area of the quadrilateral ABCD in which AB is 4.3 mm BC is 3.4 mm CD is 3.8 mm angle ABC is 95 degrees and angle BCD is 115 degrees?
Using the cosine rule diagonal BD is 6.08 mm which splits angle 95 degrees into angles of 34.5 degrees and 60.5 degrees and so the area of the quadrilateral is:- 0.5*6.08*3.4*sin(34.5) plus 0.5*6.08*4.3*sin(60.5) = 17.232 square mm
