state gov RSMSSB Junior Assistant & Lipik Grade (LDC) Mock Test 2024 Quantitative Aptitude Trigonometry

cos⁴ A - sin⁴ A is equal to:

1

2cos2 A + 1

2

1-2 sin2 A

3

2sin2 A - 1

4

-(2sin2 A + 1)

5

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