Q1 (cos⁴A − sin⁴A) is equal to
(a) 1 − 2 cos²A
(b) 2 sin²A − 1
(c) sin²A − cos²A
(d) 2 cos²A − 1
Answers
Answered by
1
Answer:
a) 1-2 Cos^2A
Step-by-step explanation:
MARK AS BRAINLIEST
Answered by
0
Answer:
(c)sin²A-cos²A
Step-by-step explanation:
cos⁴A- sin⁴A
= (cos²A+sin²A)(cos²A-sin²A)
=1× (cos²A-sin²A) [Since, the value of cos²A+sin²A is 1 ]
= (cos²A-sin²A)
hope it helps you
please thank my answer to support....
Similar questions