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Small angle approximation, please help!!?

how do I do these questions?

HELP: Since this is a transcendental equation, you cannot solve it algebraically. You could solve it graphically, but the easiest approach is just to solve it numerically.

For what value of θ (to the nearest degree) is the error in sinθ ≈ θ approximately 5%?

For what value of θ (to the nearest degree) is the error in sinθ ≈ θ approximately 1%?

For what value of θ (to the nearest degree) is the error in tanθ ≈ θ approximately 5%?

For what value of θ (to the nearest degree) is the error in tanθ ≈ θ approximately 1%?

For what value of θ (to the nearest degree) is the error in cosθ ≈ 1 - θ2/2 approximately 5%?

For what value of θ (to the nearest degree) is the error in cosθ ≈ 1 - θ2/2 approximately 1%?

please give me the rules for solving these. thanks i will give points to all.

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