Sum and Difference Formulas for Sine, Cosine, and Tangent to Find Exact Values

In this video tutorial we go through 6 examples showing you how to find exact values of sine, cosine, and tangent using the sum and difference formulas in conjunction with the unit circle.

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[dzicnle]

I really like the way you explain these. You speak clearly and make it easier for me to follow ❤

[dantran]

Thank you sm this is helping so much in precalc

[lureandloot]

Thank you so much, this really helped me a ton on my pre calc test! I love the way that you explain things, and your videos are always super clear! Do you have any videos about pythagorean identities?

[nwlhegy]

really great videos, you've been a major help in my trig, do you have any videos on the sum and difference formulas for trigonometry identity's? I could not find one and did not know if i missed it. Again these videos have been really helpful

[kenzokk]

love your studies you really helped me a lot🤩