Prove that 1 + cos 2A / sin 2A=CotA

I assume that there are parentheses missing from the question and that it should be

Prove that  1 + sin 2A + cos 2A                                                                                                                                                                              = cot A

1+sin2A−cos 2A

Use sin 2 A= 2 sin A cos A and

cos 2 A = 1−2 sin 2 A and cos 2 A = 2 cos A−1

for any of you who need the translation here it is

step-by-step explanation:

find the angular size of the equatorial radius of the earth, if the horizontal parallax of the sun

y=mx+b

step-by-step explanation:

m slope

b y-intercept