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    sin 2x = 2 × sinx × cosx. sin (2 x 45o) = 2 × sin45o × cos45o , We know that the value of these two terms are as sin45o = 12 and cos45o = 12, substituting these values in the equation above. sin90o = 2 ×12 ×12 sin90o = 2 ×12 sin90o = 1, hence proven the value of sin90o is equal to 1 (with the help of sin 2x formula)
    Solve (D^2 + D + 1)y = sin 2x. Solve (D2 + D + 1)y = sin 2x. Please log in or register to add a comment.
    You need to pull back the zoom lens. Each expression must be equal and negative of each other in order for their sum to be zero. We know that any sintheta is the exact negative of sin (theta+180). But there are infinite solutions. So, any odd multiple of 180 can satisfy equation. That is 5x=3x+ (2n+1)180.
    Formulas and identities of sin 2x, cos 2x, tan 2x, cot 2x, sec 2x and cosec 2x are known as double angle formulas because they have angle double of the angle present in their formulas. Sin 2x formula is 2sinxcosx. Sin 2x =2 sinx cosx Before going into the actual proof, first, let us take a look at the formula itself. Sin 2x = 2 sinx cosx
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