Tan (Pie / 8) - cot (Pie / 8) =?

Tan (Pie / 8) - cot (Pie / 8) =?

=-2cot (Pie / 4) = - 2

What's Tan 38?

0.78128562650671739706294997196227
Using the calculator in the attachment of window, the scientific type of "view" window

Find the value of tan22 + tan38 + root 3tan22 · tan38

tan22+tan38+√3tan22·tan38=tan(22+38)*(1-tan22·tan38)+√3tan22·tan38=tan60*(1-tan22·tan38)+√3tan22·tan38=√3*(1-tan22·tan38)+√3tan22·tan38=√3-√3tan22·tan38+√3tan22·tan38=√3

What's Tan 56

one point four eight two five six

A mathematical problem about trigonometric function with acute angle: cos (50 + a) squared + cos (40-A) - Tan (30-a) * Tan (60 + a) =?

cos(50+a)^2+cos(40-a)^2-tan(30-a)^2*tan(60+a)
=sin(90-(50+a))^2+cos(40-a)^2-tan(30-a)*cot(90-(60+a))
=sin(40-a)^2+cos(40-a)^2-tan(30-a)*cot(30-a)
=1-1
=0

Compare the following groups: (1) - 8 / 9, - 9 / 10: (2) - 0.618, - 3 / 5: (3) 0, | - 8 | (4) - one and two seventh Compare the following groups: (1) - 8 / 9, - 9 / 10: (2) - 0.618, - 3 / 5: (3) 0, | - 8 | (4) - one and two seventh, - one and one third

(1) Eight out of nine is less than nine tenths
(2) - 0.618 less than - three fifths
(3) 0 less than | - 8|
(4) - one and two seventh is greater than - one and one third

Compare the size of 8 parts of 7, 6 of 7 and 8 of 9, and write the reasons

8 / 9 > 7 / 8 > 6 / 7 denominator 9 * 8 * 7 = 504, then 8 / 9 = 8 * 56 / 9 * 56 = 448 / 504 7 / 8 = 7 * 63 / 8 * 63 = 441 / 504 6 / 7 = 6 * 72 / 7 * 72 = 432 / 504 now simple:) obviously 448 / 504 > 441 / 504 > 432 / 504 ha ha ha, it's not easy to find the answer on the Internet

What degree angle is tan? = 5 / 3

Thirty-seven

Comparison size: Tan π / 5, √ 3, Tan 5 π / 12

:tanπ/5

If Tan (α + π / 4) = - 3 / 5, find the value of Tan (α - π / 4)

tan(α+π/4)=-3/5
(tanα+1)/(1-tanα)=-3/5
tanα=-4
tan(α-π/4)=(tanα-1)/(1+tanα)=5/3
tan(α-π/4)=-cot(α-π/4+π/2)=-cot(α+π/4)=-1/tan(α+π/4)=5/3