3 years ago

24. Which of the following trigonometric expressions is NOT equivalent?

1 answer:

8 0

Tan t /(sec t -cos t)= sin t/(cos t *(1/cos t -cos t))
=sin t/(cos t*(1-cos ²t)/cos t))
=sin t/sin² t=1/sin t [or=cosec t.]

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The answer is below
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