Introduction to Trigonometry

⭐ Important Questions

1. If tan A = 34, find sin A and cos A.
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   tan A = oppadj = 34\nhyp = √3² + 4² = 5\nsin A = 35, cos A = 45
2. Prove: (1 + tan² A)/(1 + cot² A) = tan² A.
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   LHS = 1 + tan² A1 + cot² A = sec² Acosec² A\n= {1cos² A}/{1sin² A} = sin² Acos² A = tan² A = RHS