Math, asked by dandamahathi, 5 months ago

Find Sin 4A - cos 4A

Answers

Answered by priyanaveen493
1

Answer:

Given that,

sinA - cosA = 0

⇒ sinA = cosA

⇒ sinA/cosA = 1

⇒ tanA = 1

⇒ tanA = tan45°

⇒ A = 45°

∴ sin⁴A + cos⁴A

= sin⁴45° + cos⁴45°

= (1/√2)⁴ + (1/√2)⁴

= 1/4 + 1/4

= 2/4

= 1/2

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