Transcription of Double-Angle and Half-Angle Identities
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Double-Angle and Half-Angle Identities
Math Analysis Honors - Worksheet 96. Double-Angle and Half-Angle Identities d H2j0Y1j45 MKRuNtnaZ SSWolfPtMwEaAroeF S zA5ljlE irWiqgOhEtQsr Use a Double-Angle or Half-Angle identity to find the exact value of each expression. 7 7 . 1) cos 2) sin 8 8. 3) sin 165 1. 4) sin 112 . 2. 5) sin 15 23 . 6) cos 12. 1 5 . 7) sin 22 8) sin . 2 12. 3 10) sin 75 . 9) cos 8. 8 7 3 . 11) sin = and 180 < < 270 12) sin = and < < 2 . 17 25 2. Find sin 2 . Find cos 2. 9 4. 13) sin = and 270 < < 360 14) cos = and 270 < < 360 . 22 5. Find cos 2 . Find cos 2. 4 4 . 15) cos = and 270 < < 180 16) cos = and 0 < <. 5 5 2. Find cos 2 . Find sin 2. b B270X1T44 sKduxtSaI oSUoNfDt7wEaArjeQ 3 pAxlWlu Lr0iugBhzthsz 9 sMEavdFev IwSiktVh5 UI7nafFiBnZiTt2eE 0 AtlEgTerbxrvar Worksheet by Kuta Software LLC.
Double-Angle and Half-Angle Identities Use a double-angle or half-angle identity to find the exact value of each expression. 1) cos 7 π 8 2) sin 7π 8 3) sin 165 ° 4) sin 112 1 2 ° 5) sin 15 ° 6) cos 23 π 12 7) sin 22 1 2 ° 8) sin − 5π 12 9) cos 3π 8 10) sin 75 ° 11) sin θ = − 8 17 and 180 ° < θ < 270 ° Find cos θ 2 12) sin θ ...
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