1
You visited us
1
times! Enjoying our articles?
Unlock Full Access!
Byju's Answer
Standard IX
Mathematics
Introduction to Trigonometry
cos 4 A -sin ...
Question
cos
4
A − sin
4
A is equal to
(a) 2 cos
2
A + 1
(b) 2 cos
2
A − 1
(c) 2 sin
2
A − 1
(d) 2 sin
2
A + 1