if underroot 3 tan theta =1 then evaluate (cos^2 theta - sin ^2 theta).
Answers
Answered by
0
Answer:
what is chapter
friend you tell me the chapter name
Answered by
1
Answer:
root3 tan theta=1
tan theta=1/root3
theta=30degree
now
sin2theta -cos2theta
=sin (2x30)-cos (2x30)
=sin60-cos60=root3/2-1/2=(root3-1)/2
Similar questions