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education/math/MATH1060 (trig)/Identities.md
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@ -74,5 +74,6 @@ $$ a^2 - b^2 = (a-b)(a+b) $$
Simplify $\tan\theta\sin\theta + \cos\theta$: Simplify $\tan\theta\sin\theta + \cos\theta$:
1. $\dfrac{\sin\theta}{\cos\theta} * \sin\theta + \cos\theta$ 1. $\dfrac{\sin\theta}{\cos\theta} * \sin\theta + \cos\theta$
2. $\dfrac{\sin^2\theta}{cos\theta} + \cos\theta$ 2. $\dfrac{\sin^2\theta}{cos\theta} + \cos\theta$
3. $\dfrac{1 -\cos^2\theta}{cos\theta} + \cos\theta$ 3. $(\dfrac{\sin^2\theta}{cos\theta} + \cos\theta)\dfrac{\cos\theta}{\cos\theta} = \sin^2\theta*\cos^2\theta + \cos\theta$
4.
Simplify $\defrac{2 + tan^2}