check if cos 60° = cos^2 30° - sin^2 30°
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Answered by
1
Yes they will be equal.
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Answered by
2
Answer:
Step-by-step explanation:
cos60°=1/2
cos^230°=(√3/2)^2
=3/4
sin^230°=(1/2)^2
=1/4
cos^230-sin^230= 3/4-1/4
=2/4
=1/2
& cos60°=1/2
cos^230-sin^230=cos60°
Hence proved
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