Question

4 [sin⁴30° + cos⁴60° ) - 3 (cos² 45º - sin² 90°)​

Answer 1

Answer:

5/2.

Step-by-step explanation:

4(sin^4 30+cos^4 60)-3(cos^2 45-sin^2 90)

4((1/2)^4 + (1/2)^4)-4((1/2)-1)

4(1/16+1/16)-4(-1/2)

4(1/8)+2

1/2 +2

5/2.

Answer 2

Step-by-step explanation:

4[(1/2)⁴+(1/2)⁴]-3[(1/2)-(1)²]

=4[(1/16)+(1/16)]-3[(1/2)-1]

=4[(1+1)/16]-3[-(1/2)]

=4[2/16]+3/2

=(8/16)+(3/2)

=(1/2)+(3/2)

=4/2

=2

by chandan gupta from Newton's Academy ( mulund west)