Question

If A={1,2,3,4},then number of proper subsets of A is

prove that sin^2pie/6 cos^2pie/3 - tan^2pi/4= -1/2

Two sidesof a triangle are 25 cm and 30 cm find its third side if perimeter of the triangle is 100 cm

Fill in the blanks
Tan (x-y) = 

Function in decimal 7th standard whole lesson problems

x:x is postive integer and x^2→40 

(102)3

Hgthfg is phone n be able be a good

Solve the equation 
4x 6 =34

Find a and b if 3 root 2/3-root 2=a b root 2

Calculate the following ratios:
1)debt equity ratio
2) liquidity ratio
3)fixed asset to current ratio

Liabilities:

 Equity shares of Rs.10 each -2,40,000
Reserves - 40,000
Profit and loss a/c - 60,000
Secured loan - 1,60,000
Creditors - 1,00,000
Provision for tax - 40,000

Assets:

Goodwill- 1,20,000
Fixed asset(at cost) - 2,80,000
Stock- 60,000
Debtor - 60,000
Advances - 20,000
Cash - 60,000

What it indian numbers systems and international number system I have many doubt about that my..... M...... 

If d is the HCF of 56 and 72, find X y satisfying d{56x 72y. Also, show that X and y are not unique.

Find the value of  x form the following diagram    

If an invoice has been recorded twice in the statement, how do you correct this in a general ledger?

Regarding "proof of binomial theorem by induction"
Image 3 and 4 aren't opening in app as well as at website teachoo.com
Kindly fix the problem.
regards

6x(2)-2(6)x 6=0