Question

if underroot 3 tan theta =1 then evaluate (cos^2 theta - sin ^2 theta).
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Answer 1

Answer:

what is chapter

friend you tell me the chapter name

Answer 2

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