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Grade: 11

                        

(sin a + cosec a)2 + (cos a + sec a)2 = 1 + tan2 a + cot 2 aCan u give me the proof

2 years ago

Answers : (1)

Arun
24742 Points
							
Dear Nibin
 
On expanding the formula
Sin²a + cosec²a + 2 + cos²a + sec²a + 2
            (as 2 *sina*coseca = 2)
 
5 + cosec²a + cot²a = 7 + tan²a + cot²a
 
Regards
Arun (AskIITians forum expert)
 
2 years ago
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