Guest

express cos4 ​​ A in terms of cosA

express cos4​​A in terms of cosA

Grade:11

1 Answers

ng29
1698 Points
7 years ago
it is just application of trigonometry formula 
split 4A in A+3A and use formula for cos(a+b)
then expand formula for cos3x, u will get ur desired form of answer
 
APPROVE IF USEFUL

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free