Prove that sin⁴ A - cos⁴A = 2sin² A - 1.
Answers
Answered by
1
Answer:
It's very easy Mark me brainliest and plz follow
Step-by-step explanation:
(sin²a+cos²a)(sin²a-cos²a)
sin²a+cos²a=1
1(sin²a-cos²a)
sin²a-(1-sin²a). (cos²a=1-sin²a)
sin²a-1+sin²a
=>2sin²a-1
Similar questions
English,
25 days ago
Math,
25 days ago
Computer Science,
25 days ago
Social Sciences,
1 month ago
Computer Science,
1 month ago
Hindi,
9 months ago
Art,
9 months ago
Computer Science,
9 months ago