Learn how to evaluate the double angle of sine. The value of the sine of double a given angle can be obtained given the value ...

Learn how to evaluate the double angle of sine. The value of the sine of double a given angle can be obtained given the value ...

As the numbers are known on the opposite and the hypotenuse, then we look for the ratio which uses both these sides (SOH CAH TOA). That ratio is the sine ratio. \(\sin (x^\circ ) = ...

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.