Multiply two trig functions using co function and even odd identities

The video tutorial covers the tangent of negative angles and the application of even-odd identities. It explains cofunction identities and how transformations can be applied to trigonometric functions, specifically focusing on sine and cosine. The tutorial concludes with rewriting expressions in terms of sines and cosines, providing a comprehensive understanding of these concepts.

How can sine be transformed into cosine?

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Rewrite the sine of theta in terms of negative sine.

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