Answer:
See below
Step-by-step explanation:
![\frac{1}{1-cos A} - \frac{1}{1+cos A} =2 cosec A cot A \\ \\ L. H. S.= \frac{1}{1-cos A} - \frac{1}{1+cos A} \\ \\ = \frac{1+cos A - (1 - cos A)}{(1-cos A)(1+cos A)}\\ \\ = \frac{1+cos A - 1 + cos A}{1-cos^{2} A}\\ \\ = \frac{2cos A }{sin^{2} A}\\ \\ =2 .\frac{1}{sin A}.\frac{cos A }{sin A}.\\ \\ = 2.cosec \: A.cot \: A \\ \\ = R.H.S](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B1-cos%20A%7D%20-%20%5Cfrac%7B1%7D%7B1%2Bcos%20A%7D%20%3D2%20cosec%20A%20cot%20A%20%5C%5C%20%20%5C%5C%20%3C%2Fp%3E%3Cp%3EL.%20H.%20S.%3D%20%5Cfrac%7B1%7D%7B1-cos%20A%7D%20-%20%5Cfrac%7B1%7D%7B1%2Bcos%20A%7D%20%5C%5C%20%20%5C%5C%20%3D%20%5Cfrac%7B1%2Bcos%20A%20-%20%281%20-%20cos%20A%29%7D%7B%281-cos%20A%29%281%2Bcos%20A%29%7D%5C%5C%20%20%5C%5C%20%3C%2Fp%3E%3Cp%3E%3D%20%5Cfrac%7B1%2Bcos%20A%20-%201%20%20%2B%20%20cos%20A%7D%7B1-cos%5E%7B2%7D%20%20A%7D%5C%5C%20%20%5C%5C%20%3C%2Fp%3E%3Cp%3E%3D%20%5Cfrac%7B2cos%20A%20%7D%7Bsin%5E%7B2%7D%20%20A%7D%5C%5C%20%20%5C%5C%20%3C%2Fp%3E%3Cp%3E%3D2%20.%5Cfrac%7B1%7D%7Bsin%20A%7D.%5Cfrac%7Bcos%20A%20%7D%7Bsin%20%20A%7D.%5C%5C%20%20%5C%5C%20%20%3D%202.cosec%20%5C%3A%20A.cot%20%5C%3A%20A%20%5C%5C%20%20%5C%5C%20%20%3D%20%3C%2Fp%3E%3Cp%3ER.H.S)
Answer:
8 1
/2
For this we need to determine what
2
/3 of 12 3/4 is, so we multiply the fractions together.
Answer:
n = 12 , m = 5
Step-by-step explanation:
since it is said it is a parallelogram so opposite sides are equal
n = 12 (being opposite sides of parallelogram)
m + 1 = 6 (being opposite sides of parallelogram)
m = 6 - 1
m = 5
Hope it will help :)