1.

What is the value of ​

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Answer:

Note:- theta is not AVAILABLE in my keyboard so i have USED x in PLACE of theta.

So the question is

\tan(x ) \times \cos(x)

If we put,

\tan(x) = \frac{ \sin(x) }{ \cos(x) }

Then we get,

\frac{ \sin(x) }{ \cos(x) } \times \cos(x)

Which UPON simplification gives,

\tan(x) \times \cos(x) = \sin(x)

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