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CHHAYA PUBLICATION-TRIGONOMETRIC RATIOS OF ASSOCIATED ANGLES-EXERCISE - VERY SHORT ANSWER TYPE QUESTIONS (2 marks)
- Find the values: (i) cot 660^(@) + tan (-1050^@)
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- Find the values: (ii) sin 135^(@) cos 210^(@) tan 240^(@) cot 300^@ ...
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- Find the values: (iii) sin 420^(@) cos 390^(@) - cos(-300^@) sin (-3...
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- Find the values: (iv) cos^(2) ((pi)/8) + cos^(2) ((3pi)/8) + cos^(2)...
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- Find the values: (v) cos 24^(@) + cos 55^(@) + cos 125^(@)+ cos 204^...
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- If theta + phi = 60^(@), show that, sin (120^(@) - theta) = cos (30^(@...
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- Solve [0^(@) le theta le 360^(@)] : (a) sin theta = 1/2
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- Solve [0^(@) le theta le 360^(@)] : (b) sec theta = 2/(sqrt3)
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- Solve [0^(@) le theta le 360^(@)] : (c) 3 tan^(2) theta = 1
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- Prove: (i) sin 45^(@) cos 65^(@) + sin 135^(@) cos 115^(@) = 0
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- Prove: (ii) tan ((pi)/12) tan ((5 pi)/12) tan ((7 pi)/12) tan ((11 pi)...
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- Prove: (iii) "sec" (270^(@) - theta) "sec" (90^(@)- theta) - tan (270^...
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- Prove: (iv) cos 306^(@) + cos 234^(@) + cos 162^(@) + cos 18^(@) = 0.
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- If tan theta = 5/12 and sin theta is negative, find cos theta.
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