Oct 18, 2015 · Cot (-150) = sqrt(3) Cot(-150) = Cos(-150) / Sin(-150) Now Cos (-x) = Cos (x) and Sin (-x) = -Sin (x) Hence Cot(-150) = Cos (150) /(-sin(150)) = Cos(180 - 30) / (-Sin ...

May 24, 2016 · What is #cot(-150)#? Trigonometry. 1 Answer Alan N. May 24, 2016 #sqrt(3 ...

Oct 28, 2015 · Find value of cot (930) Ans: sqrt3 On the trig unit circle, cot (930) = cot (-150 + 3(360)) = cot (-150) = cot 30^@ = sqrt3 Trigonometry Science

Mar 16, 2018 · #•color(white)(x)sin210=-sin30" and "tan150=-tan30# #•color(white)(x)cot150=1/tan150# #rArrsin210/cot150=sin210/(1/tan150)#

Feb 12, 2018 · That means that our reference angle is 30^@. Since the horizontal side length is negative, that means that the actual angle is the supplement of 30^@, which is 150^@. The calculation would remain the same after any rotation of 180^@ degrees, so you can express the full answer as 150^@+180k^@ to represent the original answer and any 180^@ rotation.

How do you find the value of #cot 300^@#? What is the value of #sin -45^@#? How do you find the trigonometric functions of values that are greater than #360^@#? How do you use the reference angles to find #sin210cos330-tan 135#? How do you know if #sin 30 = sin 150#? How do you show that #(costheta)(sectheta) = 1# if #theta=pi/4#?

Oct 5, 2015 · Solve cot x = -sqrt3 in degree and radians Ans: x = 150^@; 330^@ Trig Table of Special Arcs gives __> cot x = -sqrt3 --> arc x = ((5pi)/6) and x = ((11pi)/6) In Deg ...

May 5, 2015 · cot 240 = cot ( 60 + 180) = cot 60 = (sqr3)/3

Oct 2, 2017 · ...see explanation I will assume we are working in degrees, not radians. Remember that cot theta = 1/tan theta = cos theta/sin theta ...and note that the sine of a 180 degree angle is zero, and the cosine of that angle is -1. So, this evaluates to …

May 25, 2015 · Use the trig unit circle as proof. cos 146 = cos (-34 + 180) = -cos 34 = -0.83. sin 146 = sin (-34 + 180) = sin 34 = 0.56