Question

if x =3sec2 A-1, y=tan^2 A -2 then x -3y is equal to -
a)3. b)4. c)8. d)5. ​

Answer 1

Answer:

a) 3

Explanation:

we know

X =3sec^2A

and, y = tan^2A

so , A/Q

putting the the value of x and y in our question

so,

X-3Y

= 3sec^2A - 3(tan^2A)

= 3sec^A - 3tan^2A

taking common 3

= 3(sec^2A - tan^2A)                                       (sec^2A -tan^2A = 1)

therefore,

= 3(1) = 3 /Ans

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