Page 1 :
ratio’s in | angles:, , , , Renee ee . oa Sine and Cosine are complementary of each other., I cx | __ Reverse. sin (90° — 8) = cos 0 and cos (90° ~ 0), AN AR, , 1 | | ‘Tangent and Cotangent are complementary of each other,, tan (90° ~ @) = cor 0 and cot (90° ~ 0) = tan 0., , Secant and Cosecant are complementary of each other., cosec (90° ~ @) = see @ and sec (90° ~ 8) = cosee 0., , , , , , , a is, & =v Gb aay | ©, By Pythagorean theorem] > Tan C= Identities:, , A, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , sino=% => sinto=%, x 38 a ., 3 sino== => sion, $ sin? 0+ cos? 8, “ 3 oc, Relation among trigonometric ratio’s: sin? 0+ cos? O= 1, tan0—coto secO —_cosee 0 Sinan,, , I 1 1 | see? O-tan? 0=1, sinO cos @ sec@ cosec 0- cof O=1, eG eB tam Ox cose S28, , ! I |, , L 1 1 1 :, , i, at. ms a PO + cos?O=1 cosec? 0 “cor 0, cord ian os0 Sin sme cones, , . | o ! : | 1+ cos? = sin? 0 i 1 + cot 0 = cosec* 0, secO cose cosec, , cosecO sec 0 cord OXC%F || 1 sitQ= son? —sin*O-1 = tar O cosec*@-1 = cot O, i Trigonometric ratios of standard angles:, Standard ° . ., Angies(@)|__° 30° | ase | 60° 90°, 7 Write w from 0 to 4, fey «Divide all by., 4, iad Wea Find square root., cos 0 1 3 1 1 0 Write the values in reverse order, T = Lisi Oi, tan 0 0 al V3. | Not define se cos, cot 1 Write the values in reverse order., 3 |i i 0 <_ Mite the values in reverse order, = : Use: tan 0 =, secO 1 e v2 2 Not define ——————ae___., cosec 0 2 2 4. 1 Write the values in reverse order.