SOLUTION: 42. use half angle formula to find cos sin and tan of 67 degrees and 30'
Algebra.Com
Question 174457: 42. use half angle formula to find cos sin and tan of 67 degrees and 30'
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
use half angle formula to find cos sin and tan of 67 degrees and 30'
-------------
sin(67 30') = sin(135/2)
-------
Formula: sin(135/2) = sqrt[(1-cos(135))/2]
= sqrt[(1-(1/sqrt(2))/2] = sqrt[0.85355..]= 0.92388
====================================================
cos(67 30') = cos(135/2)
-------
Formula: cos(135/2) = sqrt[(1+cos(135))/2]
= sqrt[0.146447] = 0.38268..
====================================================
tan(67 30') = tan(135/2)
------
Formula: tan(135/2) = (1-cos(135))/2 = 0.85355...
====================================================
Cheers,
Stan H.
RELATED QUESTIONS
Use half-angle formulas to find the exact values.
(a) cos 67°30'
(b) sin... (answered by lwsshak3)
Use a double- or half-angle identity to find the exact value of each trigonometric... (answered by lwsshak3)
Use a half-way identity to find exact value for sin(theta),cos(theta), and tan(theta),... (answered by lwsshak3)
Use an addition or subtraction formula to write the expression as a trigonometric... (answered by stanbon)
Use the half angle formulas to find exact value:
SIN 210 degrees
COS 60... (answered by lwsshak3)
How to find the exact value of the angle 67.5 using half-angle identities? It says for... (answered by lwsshak3)
Use half-angle formulas to find the exact values.
a. cos 15(degrees)
b. sin... (answered by jim_thompson5910)
Use a half - angle identity to find the exact value of each expression.
5) tan 45°
(answered by ikleyn,MathLover1)
Use the given information to find cos(x/2), sin(x/2), and tan(x/2):
Cos (x)=-4/5... (answered by lwsshak3)