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+ + 4² = √7² + x²
+ 4 16 = 7 + x²
+ + 9 = x²
x + 3 = x
+ β +
+++√7+++++
senβ = 3/4 tanβ = 3/√7 = 3√7/7 cotβ = √7/3
cosecβ = 4/3 secβ = 4/√7 = 4√7 / 7