Tangent repeats every 180 degrees, so Tan(180 + a) = tan(a). This site has several useful identities.
http://www.mathwords.com/t/trig_identities.htm
8 x 180 = 1,440
180 plus 124 = 304
sin(180) = 0 cos(180) = -1 tan(180) = 0 cosec(180) is not defined sec(180) = -1 cot(180) is not defined.
150
This is addtion. These numbers added to gether will give you 1050.
For tan(180 degrees), this is simply sin(180 degrees)/cos(180 degrees). To find these values, note that 180 degrees is the leftmost point on the unit circle, at y=0, x=-1, so is tan(180 degrees)=0/-1=0. Then adding 15 gives 15.
8 x 180 = 1,440
tan(135) = -tan(180-135) = -tan(45) = -1
If ø is an obtuse angle then (180 - ø) is an acute angle and: sin ø = sin (180 - ø) cos ø = -cos (180 - ø) tan ø = -tan (180 - ø)
It is used when a function takes the same values after some fixed interval, and multiples of that interval. For example, tan(x) = tax(x + 180) = tan(x + 360) = tan(x + n*180) for all integer values of n. So tan is said to be periodic, with period 180 degrees (or π radians).
tan(9) + tan(81) - tan(27) - tan(63) = 4
180 plus 124 = 304
sin(180) = 0 cos(180) = -1 tan(180) = 0 cosec(180) is not defined sec(180) = -1 cot(180) is not defined.
It is approx 0.9725
The tangent function is a periodic function with period 180 degrees sotan(360) = tan(360-2*180) = tan(0) = 0.
a + 3a + 5a = 180 9a =180 a = 20
4