TS EAMCET · Maths · Trigonometric Ratios & Identities
- A
- B
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
We know that cos2θ=1-tan2θ1+tan2θ. Hence, 1-tan215°1+tan215°=cos30° ⇒1-tan215°1+tan215°=32.
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