Math, asked by ravi151, 1 year ago

Sin58 sin 13 + cos 58 cos13

Answers

Answered by Akashmilky
3
cos(A-B)
=cos(58-13)
=cos(45)
1/√2
Answered by pitu9874
1
cos(A-B)=cosAcosB+sinAsinB
so cos58cos13+sin58sin13
=cos(58-13)
=cos45
=1÷1.414
Similar questions