Q.
Period tanθ(1+sec2θ) (1+sec4θ)(1+sec8θ) is
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a
π2
b
π
c
2π
d
π8
answer is D.
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Detailed Solution
tanθ1+sec2θ(1+sec4θ)(1+sec8θ) =tanθ1+cos2θcos2θ1+cos4θcos4θ1+cos8θcos8θ =sinθcosθ2cos2θcos2θ2cos22θcos4θ2cos24θcos8θ =sin8θcos8θ=tan8θ period is π8
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