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`tan38^(@)-cot22^(@)`= _________.

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`tan38^(@)-cot22^(@)`= _________.
A. `(1)/(2)cosec38^(@)sec22^(@)`
B. `2 sin22^(@)cos38^(@)`
C. `-(1)/(2) cosec22^(@)sec38^(@)`
D. None of these
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Correct Answer - D
(i) Convert the given trignometric value in terms of `sintheta, costheta`, then simplify to obtain the required value.
Use the formula, cost `(A+B)=cosA*cosB-sinA*sinB`.
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