Mathegoras

Trigonometry › Trigonometric identities › Complementary angles

Trig expression with complementary angles

High school · ●○○○○ 10 pts

Without using trigonometric tables, evaluate sin⁡234∘+sin⁡256∘+2tan⁡18∘tan⁡72∘−cot⁡230∘\sin^2 34^\circ + \sin^2 56^\circ + 2\tan 18^\circ \tan 72^\circ - \cot^2 30^\circ.

Sign in to save your progress.

Pythagorean identity