Sin ^ 4 + cos ^ 4 = 1, find sin + cos=

Sin ^ 4 + cos ^ 4 = 1, find sin + cos=

(SiNx) ^ 4 + (cosx) ^ 4 = 1, that is, (SiNx) ^ 4 + (cosx) ^ 4 + 2 (SiNx) ^ 2 (cosx) ^ 2-2 (SiNx) ^ 2 = 1, that is [(SiNx) ^ 2 + (cosx) ^ 2] ^ 2-2 (sinxcosx) ^ 2 = 1, that is 1-2 (sinxcosx) ^ 2 = 1, so sinxcosx = 0, so SiNx = 0 or cosx = 0, when SiNx = 0, cosx = 1 or - 1, when SiNx = 0

Given the quadratic equation of one variable 8x2 - (2m + 1) x + M-7 = 0, the values of M are obtained according to the following conditions:
(1) The two are reciprocal to each other;
(2) The two numbers are opposite to each other;
(3) One is zero;
(4) One is 1;
(5) The sum of the squares of the two is

Using Weida theorem X1 + x2 = - A / b x1x2 = A / C

Let f (x) = 1 + x-x ^ 2 / 2 + x ^ 3-x ^ 4 / 4 +. X ^ 101 / 101, G (x) = 1-x + x ^ 2 / 2-x ^ 3 / 3. - x ^ 101 / 101, if f (x) has
Given f (x) = 1 + x-x ^ 2 / 2 + x ^ 3-x ^ 4 / 4 +. X ^ 101 / 101, G (x) = 1-x + x ^ 2 / 2-x ^ 3 / 3. - x ^ 101 / 101,
If f (x) has a unique zero X1 and G (x) has a unique zero X2, then ()
A．0

A
The derivative can be observed

19 out of 51 times 34

19 / 51 × 34
= 19 / 17 × 2
= 38 out of 17

If y = 1 is a function, use the function definition of junior high school to judge and explain

Function has a y value corresponding to each variable x. there is no variable x in the title, so it is not a function

What is 0.6 times 2 and 3 / 1 times 3 and 5 / 3

6 × 2 and 1 / 3 × 3 and 3 / 5
=3 / 5 × 7 / 3 × 18 / 5
=7 / 5 × 18 / 5
=126 out of 25
=Five and one in 25

The known set a = {1,2,3,4}, then the number of subsets of a is?

The fourth power of 2

Solving equation 32x-7x + 6.56 = 8.6x

32x-7x+6.56=8.6x
(32-7-8.6)x=-6.56
16.4x=-6.56
x=-6.56÷16.4
x=-0.4

Five and three-thirds minus three and seven-thirds equals six

5 and 2 / 3 minus 3 and 6 / 7
=17 / 3-27 / 7
=119 / 21-81 / 21
=38 out of 21
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The sum of X and 7.6 is 18.2?

The sum of X and 7.6 is equal to 18.2, and the equation is: x + 7.6 = 18.2