why cos 7pi /6 is not equal to cos pi /6?
Answers
Answered by
2
because 7π/6 lies in the third quadrant ad cosine function is negative in 2nd and 3rd quadrant....
Answered by
1
cos(7π/6)
=
cos(π+π/6)
=
−cos(π/6)
=
-3√/2
Whereas cos pi/6=root3/2
=
cos(π+π/6)
=
−cos(π/6)
=
-3√/2
Whereas cos pi/6=root3/2
Similar questions