SOLUTION: instruction: evaluate the following expressions: 1. 4 cos 210 degrees + 3 tan 330 degrees. 2. csc 270degrees + 3 sin 270degrees - 2 csc 90degrees. thank you. pls. hel

Algebra ->  Trigonometry-basics -> SOLUTION: instruction: evaluate the following expressions: 1. 4 cos 210 degrees + 3 tan 330 degrees. 2. csc 270degrees + 3 sin 270degrees - 2 csc 90degrees. thank you. pls. hel      Log On


   

Question 396618: instruction: evaluate the following expressions:
1. 4 cos 210 degrees + 3 tan 330 degrees.
2. csc 270degrees + 3 sin 270degrees - 2 csc 90degrees.

thank you. pls. help me solve this problem
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

4 cos 210 degrees + 3 tan 330 degrees 

 4(-sqrt(3)/2) + 3((-1/2)/(sqrt(3)/2)

  -2sqrt(3) - 3/sqrt(3)= -2sqrt(3) - 3sqrt(3)/3 = -3sqrt(3)

Thought this (cosx, sinx) summary may be helpful to You.