Cece Tresno

1.        Given that $ \displaystyle \sin 16{}^\circ =p,$ determine the following in terms of $ \di… Read more » Trigonometry (Practice Problems)

1.        Prove that in any triangle $ \displaystyle ABC,$ (i) $ \displaystyle \sin (A+B) … Read more » Trigonometric Identities

1.          Prove that $ \displaystyle \frac{{\tan (A+B)}}{{\cot (A-B)}}=\frac{{{{{\sin }}^{2}}A… Read more » Problem Study : Trigonometric Identity

Let $ \displaystyle f(x)=\frac{{\cos x}}{{1+\sin x}}+\frac{{1+\sin x}}{{\cos x}}.$ (a) Prove that $… Read more » Trigonometric Function and Solving Trigonometric Equation

Prove that $ \displaystyle 4\sin (x+30{}^\circ )\sin (x-30{}^\circ )=3-4{{\cos }^{2}}x.$ $ \display… Read more » Problem Study (Trigonometric Identity)

Read more » Problem Study (Trigonometric Identities)

Given that , Prove that . Solution                                                                 … Read more » Problem Study (Trigonometric Identity)

$ \displaystyle \ \cos 2\alpha =1-2{{\sin }^{2}}\alpha $ ဆိုတာ သိခဲ့ပါၿပီ။ $ \displaystyle 2\alp… Read more » Half-Angle Formulae - Derivation