Question

prove that (7)sin⁴0-cos⁴0=1-2cos²0​

Answer 1

Step-by-step explanation:

lhs:

7. sin ⁴ 0 - cos ⁴ 0 = 7(0) - 1

= -1

rhs:

1- 2cos ²0 = 1 - 2(1)

= -1

therefore, lhs= rhs ( proved)