Educator

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Example 1:

Use the Pythagorean theorem to prove the Pythagorean identity.

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Example 2:

If cosθ = 0.47 and θ is in the fourth quadrant, find sinθ .

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Example 3:

Verify the following trigonometric identity :

1+cosθ sinθ = sinθ 1 − cosθ

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Example 4:

Use the Pythagorean identity to prove the Pythagorean theorem.

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Example 5:

If sinθ = − [5/13] and θ is in the third quadrant, find cosθ .