plzzzzzzz ans. the question
Asked by prasadnidhi
| 24th May, 2010,
04:06: PM
Expert Answer:
sec4θ (1-sin4θ) - 2tan2θ =
sec4θ (1-sin2θ)(1+sin2θ) - 2tan2θ =
sec4θ (cos2θ)(1+sin2θ) - 2tan2θ =
sec2θ (1+sin2θ) - 2tan2θ =
sec2θ + tan2θ - 2tan2θ =
sec2θ - tan2θ = 1 ... since sec2θ = 1 + tan2θ
Regards,
Team,
TopperLearning.
Answered by
| 24th May, 2010,
05:30: PM
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