Interactive macro-enabled MS-Excel spreadsheet. Contents: Find exact trigonometric values for 45° using an isosceles triangle. Find exact trigonometric values for 30° & 60° using an equilateral Δ. Complete a table of exact & rounded decimal trigonometric values. Establish trigonometric identities using the unit circle & similar ⊿s. Find unknown sides of right-angled triangles using exact values. Find unknown angles of right-angled triangles using exact values. Find sums of all three functions in integer, decimal or surd form. Find total distance x₁ + x₂ between two radars in surd form. Find four distances between two points & a tree in surd form. Find area A & height h of an acute or obtuse triangle in surd form. Find perimeter P & area A of three conjoined triangles in surd form.
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