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: 5. cos*60° + 4sec*30° — tan?45°, , Oe ae GN, , 10., , 1, , iw, , 12., , 14., , IS., , sin*30° + cos?30°, , . 2cos*60° + 3sin245° — 3sin230° + 2cos290°, , 3 1, , . cot?30° — 2.cos?230° — qsec’45° + g.cosec’30°, , . (sin®30° + 4.cot?45° — sec?60°)(cosec?45° sec?30°), , , , 4 1 p) ° a PAYS, a 45. sin), cot?30° sin239° 7°08 45° — sin, Show that:, .1—sin60° tan 60°—1 ;) 008 30°+sin 60° _ :, cos 60's scams) ee 30° + cos 60° ~ COS 30, , Verify each of the following:, (i) sin 60° cos 30° — cos 60° sin 30° = sin 30°, (ii) cos 60° cos 30° + sin 60° sin 30° = cos 30°, (iii) 2sin 30° cos 30° = sin 60°, (iv) 2sin 45° cos 45° = sin 90°, If A = 45°, verify that:, (i) sin 2A =2sin Acos A (i) cos 2A = 2cos?A 4} =1—2sin2A, , , , If A = 30°, verify that:, ae ment A SA tana E 2tan 2, (i) sin 2A if (ii) cos 2A = es (iii) tan 2A = citar:, , If A = 60° and B = 30°, verify that:, (i) sin(A+B)=sin Acos B+cos Asin B, (ii) cos (A +B) = cos Acos B~sin Asin B, If A = 60° and B = 30°, verify that:, (i) sin (A-—B) = sin Acos B—cos Asin B, (ii) cos (A — B) = cogs Acos B+sin Asin B, tan A-tan B, , (ili) tan (A-B) = 1+tan Atan B