3tan30°+2sin60°-2tan45°

3tan30°+2sin60°-2tan45°

3tan30°+2sin60°-2tan45°
=3×√3/3+2×√3/2-2×1
=√3+√3-2
=2√3-2
=√3+√3-2
=2√3-2
If we solve the equation 2x / (x + 1) = A / (x + 2) + 1 / (x ^ 2 + 3x + 2), we will produce increasing roots, and find the value of a?
2X / (x + 1) = A / (x + 2) + 1 / [(x + 2) (x + 1)] both sides of the equation are multiplied by (x + 2) (x + 1) at the same time to get: 2x (x + 2) = a (x + 1) + 1. Root addition can only be - 1 or - 2x = - 1. Substitute into the above formula to get: - 2 (- 1 + 2) = 1. Substitute into the above formula to get: 0 = - A + 1, get: a = 1. Therefore, it can only be a = 1. I appreciate your diligent and inquisitive spirit very much
^Do you mean multiply sign
Zenggen knows all about it. Just take it back
Calculation: 3tan30 ° - tan45 ° + 2sin60 °=______ .
The original formula is 3 × 33-1 + 2 × 32 = 3-1 + 3 = 23-1
The solution equation is: the third power of 25X + 118 = 0,
25x³+118=0
x³=-118/25
x³=-590/125
X = - (3 times root 590) / 5
2sin60 ° + 4cos45 ° + 3tan30 ° is equal to?
Sin60 ° = root 3 / 2
Cos45 ° = radical 2 / 2
Tan 30 ° = root 3 / 3
2sin60 ° + 4cos45 ° + 3tan30 ° = 2 * radical 3 / 2 + 4 * radical 2 / 2 + 3 * radical 3 / 3
=Root 3 + 2 * root 2 + root 3 = 2 * root 3 + 2 * root 2
2sin60°+4cos45°+3tan30°
=2×[(√3)/2)]+4×[(√2)/2]+3×(1/3)
=√3+2√2+1
≈5.56047793
2sin60°+4cos45°+3tan30°=2×√3/2+4×√2/2+3×√3/3=2√3+2√2
Guo Dunyong replied:
2sin60°+4cos45°+3tan30°=2×0.8660+4×0.7071+3×0.57735
=1.7320+2.8284+1.7321=6.2925。
　sin60=√3/2，cos45=sin45=√2/2，tan30=√3/3
So we can get 2 ×√ 3 / 2 + 4 ×√ 2 / 2 + 3 ×√ 3 / 3 = √ 3 + 2 √ 2 + √ 3 = 2 √ 3 + 2 √ 2
Factorization 4 (a + b) squared - 9 (a-b) squared, 25X squared - 1 / 16y squared
Square of 4 (a + b) - square of 9 (a-b) = [2 (a + b)] &# 178; - [3 (a-b)] &# 178; = [2 (a + b) + 3 (a-b)] [2 (a + b) - 3 (a-b)] = (5a-b) (5b-a) 25X & # 178; - 1 / (16y & # 178;) = (5x) &# 178; - [1 / (4Y)] &# 178; = (5x + 1 / 4Y) (5x-1 / 4Y)
4(a+b)^2-9(a-b)^2
=[2(a+b)-3(a-b)][2(a+b)+3(a-b)]
=(2a+2b-3a+3b)(2a+2b+3a-3b)
=(5b-a)(5a-b)
(25x^2-1)/16
=1/16*(25x^2-1)
=1/16*(5x+1)(5x-1)
Sin 60 degrees - Tan 45 degrees is equal to what
Sin60 degrees – tan45 degrees = √ 3 / 2-1 = (√ 3-2) / 2
Sincerely answer for you, give a praise Oh pro,
Sin60 equals the root of two, and - tan45 equals - 1
? What is the answer: Tan 45 ° = 1; Cos 60 ° = 1 / 2; sin 45 ° = √ 2 / 2.
Thank you for your adoption
The square of 25X - the square of 16y is determined by the factorization factor
25x²-16y²
=(5x)²-(4y)²
=(5x+4y)(5x-4y)
[analysis] A & # 178; - B & # 178; = (a + b) (a-b)
25x^2-16y^2
=(5x)^2-(4y)^2
=(5x+4y)(5x-4y)
25x²-16y²
=(5x)²-(4y)²
=(5x+4y)(5x-4y)
25X & # 178; - 16y & # 178; = (5x) & # 178; - (4Y) & # 178; = (5x + 4Y) (5x-4y)... So many people answered
What is 2cos 45 ° and Tan 45 ° equal to
2cos45°+tan45°
=2×√2／2＋1
=√2＋1
2cos45°+tan45°
=2×√2/2+1
=√2+1
2cos45°+tan45°=√2+1；
=1 + radical 2
√2＋1
The square of 25X minus the square of 16y is equal to the process of (using decomposition factor)
25x^2 - 16y^2
= (5x)^2 - (4y)^2
=(5x + 4y) (5x -4y)
25x^2-16y^2
=(5x-4y)(5x+4y)
Original formula = (5x + 4Y) (5x-4y)
(25x+16y)(25x-16y)