Latest REVENUE OFFICER Aptitude Question SOLUTION: (cosecA+cotA) (1--cosA)=

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(cosecA+cotA) (1--cosA)=

Asked In REVENUE OFFICER (11 years ago)

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KARTHIGA DEVI.J  (11 years ago)

Ans:
sin A
w.k.t,
cosecA=1/sinA; cotA=cosA/sinA;
(cosecA+cotA)(1--cosA)=cosecA-cosecAcosA+cotA-cotAcosA
=cosecA-(cosA/sinA)+cotA-(cos^A/sinA)
=cosecA-cotA+cotA-(cos^2 A.cosecA)
=cosecA(1-cos^2 A)
=cosecA(sin^2 A)
=(sin^2 A)/sinA
=sinA.

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Arpit Jaiswal  (11 years ago)

(cosecA+cotA)(1-cosA)=cosecA(1+cosA)(1-cosA)
=cosecA(1-cos^2A)
=cosecA(sin^2A)
=sinA

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django  (11 years ago)

answer is sin a

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Manisha Gupta  (11 years ago)

cosecA+cotA*1-cosA=(1/sinA+cosA/sinA)*sinA=sinA+cosA

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