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If secA + tanA =a, then the value of cos...

If secA + tanA =a, then the value of cosA is
यदि secA + tanA =a हो, तो cosA का मान क्या होगा?

A

`(a^2+1)/(2a)`

B

`(2a)/(a^2+1)`

C

`(a^2-1)/(2a)`

D

`(2a)/(a^2-1)`

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CHAMPION PUBLICATION-2016 TIER-II PAPER(14)-EXERCISE
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  2. D and E are points on the sides AB and AC respectively of DeltaABC suc...

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  3. ABCD is a trapezium in which AB||CD and AB=2CD. If its diagonals inter...

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  4. If O is the orthocentre of a triangle ABC and angleBOC=100^(@), the me...

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  5. PQ and RS are common tangents of two circles intersection at A and B. ...

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  6. If secA + tanA =a, then the value of cosA is यदि secA + tanA =a हो,...

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  7. If sin theta + cosec theta = 2, then the value of sin^7theta + cosec^7...

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  8. If cos x.cos y + sin x.sin y = -1 then cos x + cos y is यदि cos x.c...

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  9. The value of the expression 2(sin^(6)theta+cos^(6)theta)-3(sin^(4...

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  10. If cos theta=(x^2-y^2)/(x^2+y^2) then the value of cot theta is equal ...

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