Geometry

Sum and Difference Trigonometric Formulas

Sum to Product Trigonometric Identities

         

Which of the following is equal to cos114+cos44?\cos114^\circ+\cos44^\circ?

Which of the following is equal to cos88cos42?\cos88^\circ-\cos42^\circ?

Which of the following is equal to sin60+sin16?\sin60^\circ+\sin16^\circ?

Evaluate 16sin120+8cos105+16sin60+8cos15.16\sin120^\circ+8\cos105^\circ+16\sin60^\circ+8\cos15^\circ.

Which of the following expressions is equal to sin36+sin24? \sin{36 ^\circ} + \sin{24 ^\circ} ?

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