If tan teta = 1/√3, then the value of cos 2 teta =
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2
Answer:
tan (theta) = 1/√3
tan (theta) = tan 30° [tan 30° = 1/√3]
theta = 30°
cos 2(theta) = cos 2(30°) = cos 60° = 1/2
Answered by
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Step-by-step explanation:
tan teta = p\b
= 1\√3
h = √p2 + b2
= √1×2 + √3×2
=√1 +3
= √4
cos 2 teta = b \ h
cos teta = ( b \ h )2
=(√3\√4)2
=3\4
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