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Starting from the left-hand side (LHS) of the identity
Learn how to solve sum rule of differentiation problems step by step online.
$\frac{\sin\left(x\right)}{\sin\left(x\right)+\cos\left(x\right)}$
Learn how to solve sum rule of differentiation problems step by step online. Prove the trigonometric identity sin(x)/(sin(x)+cos(x))=tan(x)/(1+tan(x)). Starting from the left-hand side (LHS) of the identity. Divide the numerator and denominator by \sin(x). Expand both the numerator and denominator. Simplify the fraction \frac{\sin\left(x\right)}{\sin\left(x\right)} by \sin\left(x\right).