सिद्ध कीजिए कि 4 cot2 45° – sec260° + sin – InterviewSolution

1.

सिद्ध कीजिए कि 4 cot2 45° – sec260° + sin230° = 1/4

Answer»

LHS = 4cot² 45° – sec²60° + sin²30°

= 4 x (1)² – (2)² + (1/2)²

= 4 - 4 + 1/4 = 1/4 = RHS

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