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Prove that (1+tanA+cotA)•(sinA-cosB)=sinA•tanB-cotA•cosB

Prove that (1+tanA+cotA)•(sinA-cosB)=sinA•tanB-cotA•cosB

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Grade:10

2 Answers

Saurabh Koranglekar
askIITians Faculty 10336 Points
2 years ago
Dear student

Equation must be valid for all angles, Since this is not true at A = 45 and B = 60

We need some defining criteria for values of A and B

Regards
Vikas TU
14149 Points
2 years ago
Dear student 
Question is not clear 
Please attach an image, 
We will happy to  help you 
Good Luck
Cheers
 

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