The shorter sides of an acute triangle are x cm and 2cm the longest side of the triangle is 15 cm what is the smallest possible whole number value of x? 6 ,7 8, 9

Write a recursive sequence that represents the sequence defined by the following explicit formula:

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota