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otez555 [7]
2 years ago
3

Prove : 1+cosA-sin2A/sinA*(1+cosA)= cotA

Mathematics
1 answer:
ladessa [460]2 years ago
5 0
\dfrac{1+\cos A-\sin^2A}{\sin A(1+\cos A)}=\cot A\\\\L_s=\dfrac{(1-\sin^2A)+\cos A}{\sin A(1+\cos A)}=\dfrac{\cos^2A+\cos A}{\sin A(1+\cos A)}\\\\=\dfrac{\cos A(1+\cos A)}{\sin A(1+\cos A)}=\dfrac{\cos A}{\sin A}=\cot A=R_s\\\\\text{Used:}\\\\\sin^2x+\cos^2x=1\to\cos^2x=1-\sin^2x\\\\\cot x=\dfrac{\cos x}{\sin x}
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Answer:

Step-by-step explanation:

Given that the  mean incubation time for a type of fertilized egg kept at a certain temperature is 25 days.

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Step-by-step explanation:

Given:

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