Find the value of the following expression.
2(tan2A cos2A + cos2A)
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 2.
2(tan2A cos2A + cos2A)
= 2[(sin2A/cos2A)cos2A + cos2A)
= 2(sin2A + cos2A)
= 2 × 1
= 2
Therefore, the value of the expression is 2.