Description: Maths Tricks for Trigonometry and etc. all exams preparation. This fast math trick can be used to mentally work out the main basic trigonometric ratios instantly! With this fast mental math technique you can work out the sin, the cos, and even the tan of the most common angles in no time at all. Maths Tricks for Trigonometry and etc. all exams preparation. This fast math trick can be used to mentally work out the main basic trigonometric ratios instantly! With this fast mental math technique you can work out the sin, the cos, and even the tan of the most common angles in no time at all.
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