Question

21.
ConsiderAACB, right-angled at C, in which
AB=29units, BC = 21 units and ZABC = 0.
Determine the value of cos2 0 + sin2 0.​

Answer 1

Answer:

cos²Ф+sin²Ф=1

Step-by-step explanation:

AB is the hypotenuse

So AC²=AB²-BC²

=29²-21²

=(50)*8=400

AC=20

∠ABC=Ф

so cos²Ф+sin²Ф

=(BC/AB)² +(AC/AB)²

=( BC²+AC²)/AB²

=AB²/AB²=1