Answer:
b
Step-by-step explanation:
What is the question exactly?
Here,
We know that cosD= b/h
=21/75
=7/25
4y²-1/4 is the required answer
Square and cube numbers are special sequences of numbers that are linked to the property of the shape they are named after. A square number relates to the area of a square. A cube number relates to the volume of a cube.
