1/(sin(90 + θ)cos(360 - θ)) - tan²(-θ)
Note:
sin(90 + θ) = cosθ Cosine and Sine are complementary.
cos(360 - θ) = cosθ Cosine positive in 4th quadrant.
tan(-θ) = -tanθ Negative angle concept.
1/(sin(90 + θ)cos(360 - θ)) - tan²(-θ) = 1/(cosθcosθ) - (-tanθ)²
= 1/(cos²θ) - tan²θ
= (1/cosθ)² - tan²θ
Note: 1/cosθ = secθ
= (secθ)² - tan²θ
= sec²θ - tan²θ
= 1
Note that 1+ tan²θ = sec²θ is a Trigonometric identity.
That means: sec²θ - tan²θ = 1
Hope this explains it.
The solutions are: x=3+ √3 and x=3-√3
Step-by-step explanation:
ofc , so that is that and the other is that
This is pretty simple-ish, if you think about it. All we're doing is working backwards.
237,286 + 476 = 237,762
237,762/629 = 378.
We could even check it again, if you want.
378*629 = 237,762
237,762 - 476 = 237, 286.
Therefore, x = 378.
