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16/04/2026
π²πππππππ π°ππππ πππππππππππππππ
ππ ππππππππππππ’
β1. Product-to-Sum Transformations
βThese are used when you have two different trigonometric functions multiplied together and you want to separate them into a sum or ππππππππππ
ππππ° πππ π± = 1/2 πππ (π° + π±) + πππ (π° - π±)
πππ π° πππ π± = 1/2 πππ ( π° + π±) - πππ (π° - π±)
πππ π° πππ π± = 1/2 πππ (π° + π±) + πππ (π° - π±)
πππ π° πππ π± = 1/2 πππ ( π° - π±) - πππ (π° + π±)
17/03/2026
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