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The value of cos^(2)45^(@)-sin^(2)15^(@)...

The value of `cos^(2)45^(@)-sin^(2)15^(@)` is

A

`(sqrt(3))/(2)`

B

`(sqrt(3))/(4)`

C

`(sqrt(3)+1)/(2sqrt(2))`

D

`(sqrt(3)-1)/(2sqrt(2))`

Text Solution

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The correct Answer is:
B
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SUNSTAR PUBLICATION-K-CET- MATHEMATICS - 2017-MCQs
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  2. The value of cos^(2)45^(@)-sin^(2)15^(@) is

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  5. If |x-2|le 1, then

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  6. If ""^nC(12)=""^nC8 , then n is equal to :

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  11. The value of lim(theta to 0)(1-cos 4theta)/(1-cos 6 theta) is

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  18. If f(x)=8x^(3), g(x)=x^(1//3), then fog (x) is

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  19. If A = 1/pi [(sin^(-1)(xpi),tan^(-1)(x/pi)),(sin^(-1)(x/pi),cot^(-1)(p...

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  20. If the matrix A is both symmetric and skew symmetric, then

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