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Please verify :

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((cosA/(1+sinA))+((1-sinA)/cosA))=2(secA-tanA)

trigonometric-identities

asked Jul 18, 2014 in TRIGONOMETRY by anonymous

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1 Answer

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The trigonometric equation is .

Left hand side identity :

Pythagorean identity : .

Multiply numerator and denominator by (1 - sin A).

.

Reciprocal identity : 1/cos A = sec A.

Trigonometry identity : sin A/cos A = tan A.

= right hand side identity.

Therefore. .

answered Jul 18, 2014 by lilly Expert

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