Question

Prove that
2Cos45°Cos15°=√3+1/2

Answer 1

that can be written as cos(a+b)+cos(a-b)..........ie...cos(60)+cos(30)........1/2+root 3/2.....so final answer 1+root3 by 2

Answer 2

2cos45°cos1

5°=√3+1

/2