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Find the principal value of:(i) tan -1 (1/√3)(ii) sec -1 (2/√3)(iii) cosec -1 (√2) |
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Answer» (i) tan -1 (1/√3) We know that tan -1 (1/√3) = tan -1 (tan π/6) = π/6 (ii) sec -1 (2/√3) We know that sec -1 (2/√3) = sec -1 (sec π/6) = π/6 (iii) cosec -1 (√2) We know that cosec -1 (√2) = cosec -1 (cosec π/4) = π/4 |
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