Trigonometry

The sine of an angle is obtained from a right angle triangle. The other two angles are acute, or less than 90 degrees. The sin of the angle is the side opposite the angle divided by the hypotenuse.

in trigo..180 degees = ∏ radians.. so 510 = 180*2+ 150 = 2∏ + 5∏/6 =17∏/6

slope intercept formula is given by y = mx+c where m is the slope and c is the x intercept

so ur equation comes to... y=(0.25)x + 24

In a triangle a/SinA = b/SinB = c/SinC

Since angle A = 43 and angle C is 72, angle B = (180) - (72 + 43) = 65

Hence 20/Sin65 = c/Sin72

20/0.9063 = c/0.9510

c = (20 x 0.9510)/0.9063 = 20.9864

If you are really talking about a closed triangle ABC, then the length of side "a" (given as 19) does not matter in the calculation.

Sum of the angles of a triangle is 180 degrees. Angle B and C add up to 15 + 65 = 80 degrees. Hence angle A is (180 - 80) = 100 degrees

tan(30 deg) = 0.5774, approx.

1.1519+k*pi radians or 66+180*k degrees for all integers k.

A calculator for trigonometry can be purchased from WalMart, Target, Staples, Best Buy, Amazon, eBay, Radio Shack, Engineer Supply, from an iTunes app, and from Web Crawler.

An equilateral triangle has three equal sides and three equal angles. Each angle is 60 degrees.

The sign function is used to represent the absolute value of a number when used in trigonometry. It is also referred to as the signum function in math.

The relationship between an angle and the triangle formed by it is always constant. This is also why sin cos and tan obtained from the unit circle can be applied to all triangles with the same angle. All that matters is the ratio of the sides, so the calculator can "pick" any length for one side, and use that and the angle to find the other side(s). This answer will be the same regardless of which triangle you are specifically referring to. Side lengths 3 and 5 will produce the same trig values as sides 21 and 35. Also, given the processing power of most calculators, these values are often programmed in, similar to how many students are "programmed" to know the trig values for major angles such as pi, pi/4, 30deg, and 60deg.

My calculator tells me that sin 58 degrees = 0.84805

the conditions for congruent figures is that they have same shape and size,they have to be coincide each other. answer by mohit kumar pal

tan(9) + tan(81) = sin(9)/cos(9) + sin(81)/cos(81)= {sin(9)*cos(81) + sin(81)*cos(9)} / {cos(9)*cos(81)} = 1/2*{sin(-72) + sin(90)} + 1/2*{sin(72) + sin(90)} / 1/2*{cos(-72) + cos(90)} = 1/2*{sin(-72) + 1 + sin(72) + 1} / 1/2*{cos(-72) + 0} = 2/cos(72) since sin(-72) = -sin(72), and cos(-72) = cos(72) . . . . . (A) Also tan(27) + tan(63) = sin(27)/cos(27) + sin(63)/cos(63) = {sin(27)*cos(63) + sin(63)*cos(27)} / {cos(27)*cos(63)} = 1/2*{sin(-36) + sin(90)} + 1/2*{sin(72) + sin(36)} / 1/2*{cos(-36) + cos(90)} = 1/2*{sin(-36) + 1 + sin(36) + 1} / 1/2*{cos(-36) + 0} = 2/cos(36) since sin(-36) = -sin(36), and cos(-36) = cos(36) . . . . . (B) Therefore, by (A) and (B), tan(9) - tan(27) - tan(63) + tan(81) = tan(9) + tan(81) - tan(27) - tan(63) = 2/cos(72) – 2/cos(36) = 2*{cos(36) – cos(72)} / {cos(72)*cos(36)} = 2*2*sin(54)*sin(18)/{cos(72)*cos(36)} . . . . . . . (C) But cos(72) = sin(90-72) = sin(18) so that sin(18)/cos(72) = 1 and cos(36) = sin(90-36) = sin(54) so that sin(54)/cos(36) = 1 and therefore from C, tan(9) – tan(27) – tan(63) + tan(81) = 2*2*1*1 = 4

tan(11o)

= 0.19438

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To get this answer, type in tan(28) in your calculator. It should come out to be about .532. Make sure your calculator is in Degree mode.

1.8807 is. (rounded)

No, not even close. Though both work with variables in some instances and other mathematical techniques, such as logarithms and algebraic manipulation, algebra is mostly equation solving to get the variables value, though trig has equations, while trig is the study of triangular and circular measurement and using these measurements to solve specific problems. Trig is much about identities, functions and many formulas while algebra is mostly about function and equation manipulation.

Still, they are both mathematical disciplines.

Some of them but not all.

For example, uniqueness.

The rectangular coordinates (x, y) represent a different point if either x or y is changed. This is also true for polar coordinate (r, a) but only if r > 0. For r = 0 the coordinates represent the same point, whatever a is. Thus (x, y) has a 1-to-1 mapping onto the plane but the polar coordinates don't.

Radians:

tan(145)

= 0.5292052776

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cos(x)=sin(x-tau/4)

tan(x)=sin(x)/cos(x)

sin(x)=tan(x)*cos(x)

cos(x)=tan(x-tau/4)*cos(x-tau/4)

you can see that we have some circular reasoning going on, so the best we can do is express it as a combination of sines and cotangents:

cos(x)=1/cot(x-tau/4)*sin(x-tau/2)

tau=2*pi

COS 16.5 = 0.7

There are several ways to look at it....

The peak amplitude of the functions y = sin(x) and y = cos(x) is 1.

The peak-to-peak amplitude of the functions is 2.

The RMS (root mean square) amplitude of the functions is the reciprocal of the square root of two (2-½ ≈ 0.707).

360o - 215o

= 145o

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