Evaluate the following expression:
3 tan245° + 2 cos 60° − 2 sin 30°
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 3.
3 tan2 45° + 2 cos 60° – 2 sin 30°
⇒ 3 × 12 + 2 × 1/2 – 2 × 1/2
⇒ 3 × 1 + 2 × 1/2 – 2 × 1/2
⇒ 3 × 1 + 1 – 1
⇒ 3