Question

$Ifta{n}^{2}A=2ta{n}^{2}B+1;thenwhichofthefollowingcanbethepossiblevaluesofco{s}^{2}A+si{n}^{2}B?$

• A. - 2
• B. 1
• C. 2
• D. - 1

Answer 1

The correct option is B

1

Since both the terms in the ``find'' entry are in squares, so the answer cannot be - 1.

Again it cannot be 0 also because for that both the terms should be zero as none can be negative for both the terms to be 0.

Again the answer cannot be 2 also because then both the terms in find entry should be 1 as it will make tan 90${}^{\circ }$ which is undefined. So the possible value can be 1 only.