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If theta lies in the first quadrant and ...

If `theta` lies in the first quadrant and `cos^2 theta-sin^2 theta=1/2`, then the value of `tan^2 theta+sin^2 3 theta` is :
यदि `theta` पहले चतुर्थाश में स्थित है और `cos^2 theta-sin^2 theta=1/2` है, तो `tan^2 theta+sin^2 3 theta` का मान ज्ञात करें |

A

4

B

`4//3`

C

`7//2`

D

3

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