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Sin 2x formula is one of the double angle formulas in trigonometry. Using this formula, we can find the sine of the angle whose value is doubled.

In mathematics, an "identity" is an equation which is always true, regardless of the specific value of a given variable. An identity can be "trivially" true, such as the equation x = x or an identity can be …

It’s asking: At what angle does the sine function equal 1 2 21 ? These equations might look strange at first—curvy letters, unfamiliar symbols—but at their core, they’re just puzzles.

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To determine sin^2 (2x), we can use the double angle identity for sine, which states that sin (2x) = 2sin (x)cos (x).

Learn sine double angle formula to expand functions like sin (2x), sin (2A) and so on with proofs and problems to learn use of sin (2θ) identity in trigonometry.