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Please verify :

0 votes

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

asked Jul 18, 2014 in TRIGONOMETRY by anonymous

1 Answer

0 votes

The trigonometric equation is image.

Left hand side identity : image

image

image

Pythagorean identity : image.

image

image

image

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

image

image

image

image

image.

Reciprocal identity : 1/cos A = sec A.

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

image

= right hand side identity.

Therefore. image.

answered Jul 18, 2014 by lilly Expert

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