Product To Sum Identities and Sum To Product Formulas - Trigonometry

This trigonometry video tutorial explains how to simplify trigonometric expressions using the product to sum identities and how to find the exact value of trigonometric expressions using the sum to product formulas.
Bearing Problems and Navigation:
• Bearing Problems & Nav...
Two Triangle Problems - More Examples:
• Trigonometry - How To ...
Verifying Trigonometric Identities:
• Verifying Trigonometri...
Sum and Difference Identities:
• Sum and Difference Ide...
Double Angle Identities:
• Double Angle Identitie...
Verifying Trig Identities With Double Angles:
• Verifying Trigonometri...
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Power Reducing Formulas:
• Simplifying Trigonomet...
Half Angle Formulas:
• Half Angle Formulas & ...
Verifying Trig Identities Using Half Angles:
• Verifying Trigonometri...
Inverse Trig Functions With Double Angles:
• Inverse Trig Functions...
Right Triangle Trig With Half Angle Identities:
• Right Triangle Trigono...
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Solving Trig Equations - Finding All Solutions:
• Solving Trigonometric ...
Solving Trig Equations With Multiple Angles:
• How To Solve Trigonome...
Solving Trig Equations With Double Angles:
• Solving Trigonometric ...
Trigonometry Final Exam Review:
• Trigonometry Final Exa...
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[@TheOrganicChemistryTutor]

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[@rostyloco1]

the first one is sin a sin b = 1/2 [cos(a-b)-cos(a+b)]

[@davidstevensom4330]

I believe the first product-to-sum identity is supposed to be SinASinB = 1/2 [Cos(A-B) -- Cos(A+B)] It would make sense that the 4 product-to-sum identities were 1 with SinASinB, 1 with CosACosB, 1 with SinACosB, and lastly, 1 with CosASinB.

[@georgesadler7830]

MR. Organic Chemistry Tutor, thank you for explaining and analyzing the Product to Sum Identities and Sum to Product Formulas.

[@betahome4811]

Wow I love this it made me this particular particular place very well

[@laspalmasmusic956]

This video helped me a lot, thank you bro

[@Sergio98monster]

is the first one 1/2( sin(u+v(+sen(u-v)) , and whats

[@harshulguleria2070]

But in my book its :-

[@MrRobot-ry7ky]

what am i supposed to do when i have something of the form : sin(a)+sin(b)+sin(c)? how should i go about transforming it?

[@maxwellmagazi4268]

Thank you!

[@jamessieglock946]

These ads are becoming ridiculous (Sitting through at least 6 ads through this video that would not let me skip)

[@ajrelevo8317]

Hello! I noticed that some of the signs were opposites compared to the book and internet, does this affect the answer? Thank you!

[@hudagal6471]

I got confused the moment I saw a correction

[@qichi2021]

These are cool but how do you prove them

[@JHANSI_REDDY]

They have thrown everything on us in just 11th grade .This is insane 😳I'm dying 😭

[@KhalidDahiruabubakar]

I'm Khalid from Nigeria

[@friedrichfermi6559]

0:24

[@MrSharon1969]

i love you

[@user-bo7wu3rp2r]

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[@hudagal6471]

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