sec(x)−cos(x)sin2(x)=sec(x)\frac{sec\left(x\right)-cos\left(x\right)}{sin^2\left(x\right)}=sec\left(x\right)sin2(x)sec(x)−cos(x)=sec(x)
3=−7+5x3=-7+5x3=−7+5x
−2(8+8v)+6v-2\left(8+8v\right)+6v−2(8+8v)+6v
sinx=cosxtanx\sin x=\cos x\tan xsinx=cosxtanx
−3x≥5x+8-3x\ge5x+8−3x≥5x+8
(x+2)−(2x+1)\left(x+2\right)-\left(2x+1\right)(x+2)−(2x+1)
sen210∘ + sec300∘sen210^{\circ}\:+\:sec300^{\circ}sen210∘+sec300∘
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