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Grade: 10
        
Prove:(Sin A/Sec A+tan A-1)+(Cos A/Cosec A+Cot A-1)=1
10 months ago

Answers : (2)

Arun
14827 Points
							
Dear student
 
(SinA * cosA )/(1 + sinA - cosA)  + (cosA* sinA)/(1 + cosA - sinA)
= (SinA * cosA) [1/(1 + sinA - cosA)  +  1/(1 + cosA -sinA)]
 
On taking LCM and then solving
 
= 2 sinA cosA/ 2 sinA cosA
= 1 = RHS
 
Hence proved
 
Regards
Arun (askIITians forum expert)
10 months ago
Mohammad Aamir
30 Points
							(SinA/SecA +TanA -1) + ( cosA/cosecA + cotA - 1) = 1Solution(SinA.CosA + tanA- 1) + (cosA.Sin A +CotA - 1)Put A=45(1/root 2×1/root2 +1-1) + (1/root2×1/root2 +1-1)(1/2+1-1)+(1/2+1-1)1/2+1/21 proved
						
10 months ago
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