Using sum and difference formula to find the exact value with cosine Published 2016-01-12 Download video MP4 360p Download video MP4 720p Recommendations 06:14 Find the exact value using difference formula of two angles with sine 05:08 Find Exact Values of Trig Functions 06:37 How to use the sum and difference formula for tangent 05:22 Simplifying trigonometric expressions by using pythagorean identities 21:44 Sum and Difference Identities & Formulas - Sine, Cosine, Tangent - Degrees & Radians, Trigonometry 06:57 Sum and Difference Formulas 05:12 Verifying a trigonometric Identities 06:03 Pre-Calculus - How to find the exact value by using the sum of two angles formula with cosine 08:43 Tangent Sum and Difference Formulas How to Use 10:06 Stop memorizing the unit circle 08:10 Finding Exact Trig Values Using Special Angles (Radians) 06:38 How to find the exact value using the difference formula of two angles for tangent 21:37 Sum and Difference Identities of Sine and Cosine 03:56 Evaluate the trig expression with inverse tan 08:06 How do you simplify trigonometric expressions 12:39 How To Find The Exact Values of Trig Functions 06:56 How to find the exact value by using the sum of two angles formula with tangent 51:27 Introduction to Sum and Difference Formulas in Trigonometry (Precalculus - Trigonometry 25) 13:55 Finding Exact Values of Trig Functions 10:15 Half Angle Formulas & Identities - Evaluating Trigonometric Expressions Similar videos 19:25 Sum and Difference Formulas for Sine, Cosine, and Tangent to Find Exact Values 11:59 Sum to Product Identities and Product to Sum Formulas 58:07 Using Sum and Difference Formulas in Trigonometry (Precalculus - Trigonometry 26) 13:25 Product To Sum Identities and Sum To Product Formulas - Trigonometry 02:59 Using Sum and Difference Formulas to Find the Exact Values of a Cosine Trig Function 15:47 Using Sum and Difference Formulas Involving Inverse Trigonometric Functions [7.5-4] 02:09 Find the Exact Value using the Sum and Difference Identities 01:59 Use a sum or difference formula to find the exact value of cos(165 degrees) 06:10 How to evaluate for cosine using the sum and difference identities 09:29 Formulas for Trigonometric Functions: Sum/Difference, Double/Half-Angle, Prod-to-Sum/Sum-to-Prod More results