Question

4sin²x+4cos²x is :-
options
(1) ≥4
(2) ≤4
(3) ≤2
(4) ≥2
​

Answer 1

Answer:

option 1

But it will be =4

Step-by-step explanation:

put x=90°

4sin2(90)+4cos2(90)

4(1)+4(0)

4

put x=45°

4sin2(45)+4cos2(45)

4(1/√2)^2+4(1/√2)^2

4(1/2)+4(1/2)

2+2

4

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