Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AP EAMCET202017 Sep 2020Evening ShiftMathematicsTrigonometric Ratios & IdentitiesActual

( 9^ - 27^ - 63^ + 81^ = )

Options

  1. A1
  2. B2
  3. C3
  4. D4

Correct answer

D. 4

Step-by-step solution

( aligned & 9^ - 27^ - 63^ + 81^ & = 81^ + 9^ - ( 63^ + 27^ ) & = 9^ + 9^ - ( 27^ + 27^ ) & = ^2 9^ + ^2 9^ 9^ 9^ - ^2 27^ + ^2 27^ 27 27 & = 1 9^ 9^ - 1 27^ 27^ & = 2 18^ - 2 54^ =2 54- 18 54 18 & = 4 36 18 36 18 =4 aligned )

Practice Trigonometric Ratios & Identities on Quantrex Academy →

More from Trigonometric Ratios & Identities

If x+ x= 1 2 and 0 < x < , then x= 2025If A and B are acute angles satisfying 3 ^2 A+2 ^2 B=4 and 3 A B = 2 B A , then A+2 B= 2025In a ABC , if ^2 ~B = A and 2 ^2 ~A =3 ^2 ~B , then the triangle is 202512 2 12 3 12 4 12 5 12 6 12 = 2025If ( 4 + )= ^3 ( 4 + ) , then ( + ) ( - )= 2025If A+B+C+D=2 , then A+ B+ C+ D= 2025(4 ^2 20 -1 ) (4 ^2 3 20 -1 ) (4 ^2 5 20 +1 ) (4 ^2 7 20 -1 ) (4 ^2 9 20 -1 )= 2025If A and B are the values such that (A+B) and (A-B) are not odd multiples of 2 and 2 (A+B)=3 (A-B) , then A A= 2025 Full Trigonometric Ratios & Identities list All AP EAMCET PYQs