![maths - 20 Algebra_ Formulas Funaamental, Compound & Double -Angle Rules cosec 0 sec 0 sin 0 sin 0 tan 0 cot 0 Cos 0 cos 0 sin 0 sin20 Cos20 = 1 1+ cot20 cosec29 1 + tan?0 sec20 ton 0 C0$ cos 0 90%- 0 cos 0 sin 0 sin 6 Cos 0 cosec 0 sin (90% cot 0 sec0 0) = cos 0 sin 0 cos 0 sin 0 A+ 8 A+ B 90'_ 0 90"-0 sin(A+B) sinAcosB cos(A+ B) = cosAcosB] tan Cos(909 (909 0) = sin 0 0) cot 0 cosAsinB sinAsinB 13 A+ B A-B १५ 16 A-B A-B tanA + tanB sin (A -B) = sinAcosB Cos(A -B) tanB cosAcosB tanA tan(A+B) tan(A-B) cosAsinB sinAsinB 1-tanAtanB 1+tanAtanB 18 2sinAcosB ZcosAcosB sin(A+B) sin(A -B) Cos(A + B) + cos(A B) cos?A sin?A sin2A 2sinAcosA cos2A Tips: Memorize fundamental identities Tirst. the Use complementary (90*- 0), compound, and double-angle formulas to simplify problems 20 Algebra_ Formulas Funaamental, Compound & Double -Angle Rules cosec 0 sec 0 sin 0 sin 0 tan 0 cot 0 Cos 0 cos 0 sin 0 sin20 Cos20 = 1 1+ cot20 cosec29 1 + tan?0 sec20 ton 0 C0$ cos 0 90%- 0 cos 0 sin 0 sin 6 Cos 0 cosec 0 sin (90% cot 0 sec0 0) = cos 0 sin 0 cos 0 sin 0 A+ 8 A+ B 90'_ 0 90"-0 sin(A+B) sinAcosB cos(A+ B) = cosAcosB] tan Cos(909 (909 0) = sin 0 0) cot 0 cosAsinB sinAsinB 13 A+ B A-B १५ 16 A-B A-B tanA + tanB sin (A -B) = sinAcosB Cos(A -B) tanB cosAcosB tanA tan(A+B) tan(A-B) cosAsinB sinAsinB 1-tanAtanB 1+tanAtanB 18 2sinAcosB ZcosAcosB sin(A+B) sin(A -B) Cos(A + B) + cos(A B) cos?A sin?A sin2A 2sinAcosA cos2A Tips: Memorize fundamental identities Tirst. the Use complementary (90*- 0), compound, and double-angle formulas to simplify problems - ShareChat](https://cdn4.sharechat.com/bd5223f_s1w/compressed_gm_40_img_870985_fbbebae_1783384869142_sc.jpg?tenant=sc&referrer=pwa-sharechat-service&f=142_sc.jpg)
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