Question
Evaluate without using a calculator or tables
sin(pi/3 - 3pi/4)
The answer is - 1+ square root of 3 / 2 square root of 2
How do I get this answer?
sin(pi/3 - 3pi/4)
The answer is - 1+ square root of 3 / 2 square root of 2
How do I get this answer?
Answers
Reiny
If it makes it any easier for you to see the angles in degrees, convert them
pi/3 radians = 60º and 3pi/4 = 135
so sin(pi/3-3pi/4) = sin(60-135) = sin
(-75)
now sin(-75) = -sin(75)
-sin(75) = -sin(45+30)
use the formula we used in the previous posted like questions.
I will check your answer.
pi/3 radians = 60º and 3pi/4 = 135
so sin(pi/3-3pi/4) = sin(60-135) = sin
(-75)
now sin(-75) = -sin(75)
-sin(75) = -sin(45+30)
use the formula we used in the previous posted like questions.
I will check your answer.