Question

Решите пример

Answer 1

(tgα+ctgα)²-(tgα-ctgα)²=tg²α+2tgα*ctgα+ctg²α-(tg²α-2tgα*ctgα+ctg²α)=

=tg²α+2*1+ctg²α-tg²α+2*1-ctg²α=4

Answer 2

Solving the Equation

To solve the given equation, we can use the order of operations (PEMDAS/BODMAS) to simplify the expression step by step.

The given equation is: 720:8+200:(304-300)

First, let's solve the expression within the parentheses: - 304 - 300 = 4

Now, we can substitute the value back into the original expression: - 720:8 + 200:4

Next, we solve the division operations: - 720 ÷ 8 = 90 - 200 ÷ 4 = 50

Finally, we add the results of the division operations: - 90 + 50 = 140

So, the solution to the equation 720:8+200:(304-300) is 140.

Conclusion

The solution to the given equation 720:8+200:(304-300) is 140.