Description: 👉 Learn how to use the double angle identities to solve trigonometric equations. When we have equations with a double angle we will apply the identities to create an equation that can ...
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Solving an equation using the half angle formula of sine
👉 Learn how to solve equations using half-angle identities. To do this we will replace every trig function with half angles ...
Being able to identify which formula to use, sine or cosine, and when, is necessary to answer questions on this topic successfully. Check you are confident in how to use the sine and cosine rules.
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