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NIELIT 2022 Feb Scientist D - Section D-10

 

If $\sin 3A = \cos (A – 26^{\circ}),$ where $3A$ is an acute angle then the value of $A$ is :

  1. $29^{\circ}$
  2. $31^{\circ}$
  3. $39^{\circ}$
  4. $23^{\circ}$
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