Is cos^2 theta equal to cos 2 theta
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cos^2 theta may or may not be equal to cos 2thetha
eg: 1) let theta =0°
cos^2 0°=(1)^2=1
cos 2(0)°=cos 0°=1
.°.cos^2 theta=cos 2 theta
2)let theta =45°
cos^2 45°=(1/√2)^2=1/2
cos 2(45°)= cos 90°=0
.°.cos^2theta ≠ cos 2theta
HOPE IT HELPS
eg: 1) let theta =0°
cos^2 0°=(1)^2=1
cos 2(0)°=cos 0°=1
.°.cos^2 theta=cos 2 theta
2)let theta =45°
cos^2 45°=(1/√2)^2=1/2
cos 2(45°)= cos 90°=0
.°.cos^2theta ≠ cos 2theta
HOPE IT HELPS
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