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Question #873d9

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Apr 8, 2017

# cot(x) + cot(180°−x)+ tan (90°+x)#

.#= cot(x) - cot(x)- cot (x)=-cotx#

3 #sec^2(α− (3π)/2 )− cos((3π)/2 +α)csc(π−α)#

#=sec^2(-( (3π)/2-alpha ))− cos((3π)/2 +α)csc(π−α)#

#=sec^2( (3π)/2-alpha )− cos((3π)/2 +α)csc(π−α)#

#=-cosec^2( alpha )−sin(α)csc(α)#

#=-cosec^2( alpha )−1#

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