cos(pi/6)=sqrt(3)/2=0.8660254038 in radians Just enter the numbers into any calculator. In this case, I used Radians.

2016年9月24日 · How do you find all the solutions for #2 \sin^2 \frac{x}{4}-3 \cos \frac{x}{4} = 0# over the

2016年4月11日 · and # sin(pi/3) = (sqrt3)/2 , sin(pi/6) = 1/2 # substituting these values into the right side of the expansion. #= [1/2xx(sqrt3)/2] +[ (sqrt3)/2xx 1/2] = 1/4 sqrt3 + 1/4 sqrt3 = 1/2 sqrt3#

Since #pi/6# is 30 degrees on the unit circle, draw a triangle on the where 30 degrees is the reference angle. Since cosine is #a/h#, the respective sides are #sqrt3# being the adjacent side and 2 being the hypotenuse.

2016年12月14日 · The answer is =-3/4i There are 2 ways for the simplification cos(pi/6)=sqrt3/2 sin(pi/6)=1/2 cos(2pi/3)=-1 ...

8(cos 60 degrees + i sin 60 degrees ) B. Give the complex number in trigonometric form r(cos theta + i sin theta) , with theta in the interval (0 degrees , 360 degrees ) Perform multiplication and division of the complex number and leave the result in trigonometric form. 3/2(cos pi/6 + i sin pi/6) 6(cos pi/4+i sin pi/4)

2016年4月7日 · Zero Apply the trig identity: cos (a - b) = cos a.cos b + sin a.sin b cos ((2pi)/3 - pi/6) = cos ((2pi)/3).cos (pi/6) + sin ((2pi)/3).sin (pi/6) Trig table gives ...

2017年3月1日 · See below. cos(x + a) - cos(x - a) = -2 sin x sin a so -2 sin x sin a=1->sinx = -1/(2sina) = -1/(2 xx 1/2) = -1 so x = arcsin(-1)+2kpi=- pi/2+2kpi then x = 3/2pi

2016年7月15日 · How do you evaluate #sin(45)cos(15)+cos(45)sin(15)#? How do you write #cos75cos35+sin75sin 35# as a single trigonometric function? How do you prove that #cos(x-y) = cosxcosy + sinxsiny#?

Find the exact value of cos (7 pi/6). Find the value of a and c if the angle at A is \pi/6. Find the value of the expression: sin(pi/6) cos (5pi/6) - cos (pi/6) sin (5pi/6). Find the exact value for sin(pi - pi/6). Find the exact value of sin (pi/6). Find the exact value of the sin pi/6. What is the exact value of cos pi/6 as found on the unit ...