Additional Math – Important Trigonometry Rules
Summary of Some of the Important Trigonometry Rules. This is not exhaustive the links for the complete list of Trigonometric [...]
Summary of Some of the Important Trigonometry Rules. This is not exhaustive the links for the complete list of Trigonometric [...]
$latex \displaystyle \cot \left( {\frac{x}{2}} \right)-2\cos \left( {\frac{x}{2}} \right)=0$ Convert cotangent into cosine divided by sine. $latex \displaystyle \frac{{\cos \left( [...]
$latex \displaystyle \ \frac{{\cot A-\tan A}}{{\cot A+\tan A}}$ $latex \displaystyle (\cot A-\tan A)\div (\cot A+\tan A)$ Change tan A to [...]
While preparing students for the mid year exam 2019, I stumbled upon a very challenging question, I have never came [...]
$latex \displaystyle y={{\cot }^{2}}x-5+\cos ecx$ It is difficult to differentiate cot x and cosec x directly. You need to change [...]
RHS $latex \displaystyle \frac{{\tan x-1}}{{\tan x+1}}$ Change tan x to sin x /cos x and 1 to cos x /cos [...]
$latex \displaystyle \frac{{\cos x}}{{1-\sin x}}=\tan x + \sec x$ The rule of thumb is to always prove from the side [...]
Use the Cosine Double Angle Formula again, (NOT SINE DOUBLE ANGLE) to help derive Cosine 1/2 Angle. $latex \displaystyle \text{cos}\ [...]
Use the Cosine Double Angle Formula (found in Formula List) to help derive Cosine 1/2 Angle. $latex \displaystyle \text{cos}\ 2A=2{{\cos [...]
Sunday Additional Math Group Tuition at Woodlands - prove identities trigonometry $latex \displaystyle \text{LHS}$ $latex \displaystyle {{\sec }^{4}}x-{{\tan [...]