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#### Online Quiz (WorksheetABCD)

Questions Per Quiz = 2 4 6 8 10

### High School Mathematics - 210.10 Trignometry Ratios of Certain Specific Angles

 Directions: Answer the following questions. Also write at least 10 examples of your own.
 Q 1: If (cos A + 1)/sin A = 5, then show that cos A = 12/13Answer: Q 2: If tan A = Ö2 - 1, show that sin A.cos A = Ö2/4Answer: Q 3: If 7 sin2 θ + 3 cos2 θ = 4, show that tan θ = 1/Ö3Answer: Q 4: If sec θ = 5/4, prove that (sin θ - 2 cos θ)/ (tan θ - cot θ) = 12/7Answer: Q 5: If tan A = 1/Ö3, show that sin A.cos B + cos A.sin B = 1Answer: Q 6: If tan α = 2, prove that sin α.sec α + tan2α - cosec α = (12 - Ö5)/2Answer: Q 7: If sin α = 3, prove that cos α. cosec &alphaα + tan α.secα = (16Ö2 + 3)/8Answer: Q 8: If 7 sin A = 24 cos A, prove that 14 tan A + 25 cos A - 7 sec A = 30.Answer: Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!