Question

find the value of 4 sin ²30-4 cos ²60
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Answer 1

Answer:

ans is 0

Step-by-step explanation:

4 ×( 1/2)²- 4× (1/2)²

4× 1/4 -4×1/4

1-1

0

Answer 2

Answer:

4sin²30 - 4cos²60

=4(sin²30 - cos²60)

≈4(0.98-0.91)

≈4(0.07)

≈0.28

or

4sin²30° - 4cos²60°

=4(sin²30° - cos²60°)

=4({1/2}² - {1/2}²)

=4(0)

=0