Use a sum or difference formula to find the exact value of cos(165 degrees) Published 2020-12-02 Download video MP4 360p Recommendations 04:42 Using sum and difference formula to find the exact value with cosine 14:45 Galois Theory Explained Simply 06:38 How to find the exact value using the difference formula of two angles for tangent 13:47 How to use the sum formulas for sin(75°), cos(165°), and tan(345°) 12:39 How To Find The Exact Values of Trig Functions 04:00 Find the exact value of sin 195. 04:43 Trigonometry: Exact value of sin pi/8 (sin 22.5) 03:42 Determine Exact Value of Tan 105 degree using Compound Angle 05:37 Evaluating the exact value using sum formula for tangent, tan 06:37 How to use the sum and difference formula for tangent 21:44 Sum and Difference Identities & Formulas - Sine, Cosine, Tangent - Degrees & Radians, Trigonometry 14:13 Trigonometry: Find Exact Value Using Half Angle Identity 02:59 They Thought I Was CHEATING.... 06:14 Find the exact value using difference formula of two angles with sine 18:16 Double Angle Identities & Formulas of Sin, Cos & Tan - Trigonometry 03:26 cos 345 15:57 Arc Length of a Circle Formula - Sector Area, Examples, Radians, In Terms of Pi, Trigonometry 15:51 e to the pi i for dummies 01:44 Find the exact value of the indicated trigonometric function of theta. sin2x 21:37 Sum and Difference Identities of Sine and Cosine Similar videos 03:39 cos 165 01:51 sin 165 degrees 01:49 Find the exact value of the cosine of 165 degrees using addition properties 03:09 Evaluating the difference of two angles for sine 51:27 Introduction to Sum and Difference Formulas in Trigonometry (Precalculus - Trigonometry 25) 19:25 Sum and Difference Formulas for Sine, Cosine, and Tangent to Find Exact Values 08:00 Evaluate tangent sum and difference formula 10:15 Half Angle Formulas & Identities - Evaluating Trigonometric Expressions 09:14 How to evaluate the difference of two angles for tangent, tan 05:03 Trigonometry Sum and Difference Formula Example 3 02:25 Learn how to evaluate using the sum formula of two angles cosine 09:25 Pre-Calculus - Using the sum formula for cosine to evaluate an angle cos(75) 00:49 How to find sin(165deg) using a sum formula More results