cotx-tanx=
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Answer:
cotx - tanx = cosx/sinx - sinx/cosx
= cosx^2 - sinx^2/sinxcosx
= cos2x /sinxcosx ( cos^2-sin^2 = cos2x)
= 2cos2x/2sinxcosx (multiply both denominator or numerator by 2)
= 2 cos2x / sin2x ( sin2x = 2sinxcosx)
= 2 cot2x
Step-by-step explanation:
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