examples, and problems from the community.

including olympiad champions, researchers, and professionals.

Back to all chapters
# Sum and Difference Trigonometric Formulas

These formulas explain how to add and subtract trigonometric functions (and their arguments). If you've got sum time, see what a difference these formulas will make for your trig toolkit.

examples, and problems from the community.

including olympiad champions, researchers, and professionals.

Sign up to access problem solutions.

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

examples, and problems from the community.

including olympiad champions, researchers, and professionals.

Sign up to access problem solutions.

by **Brilliant Staff**

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

examples, and problems from the community.

including olympiad champions, researchers, and professionals.

Sign up to access problem solutions.

by **Brilliant Staff**

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

examples, and problems from the community.

including olympiad champions, researchers, and professionals.

Sign up to access problem solutions.

by **Brilliant Staff**

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

examples, and problems from the community.

including olympiad champions, researchers, and professionals.

Sign up to access problem solutions.

by **Brilliant Staff**

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

examples, and problems from the community.

including olympiad champions, researchers, and professionals.

Sign up to access problem solutions.

by **Brilliant Staff**

×

Problem Loading...

Note Loading...

Set Loading...