ค่า sin cos กับวงกลมหนึ่งหน่วย

¥ม Page 2 We will usually use the abbreviated names of the functions Notice from Table that the pairs sin A and cosec A , cos A and sec A, and tan

sin A - 3 3 sin 0 , cos u cos A r2 sin 0 , cos 0 I

cosmo789 cot θ = cos θsin θ Trigonometric Identities of Opposite Angles In trigonometry angle measured in the clockwise direction is measured in

cosmo365 cos b In like manner , sin B cos A = cos a 139 From , , and , we have cos c = cos a cos b = cos A cos B X cot A cot B sin B sin A