B i think don’t come at me if it’s wrong lol
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.
Answer:
3
Step-by-step explanation:
All I can tell you with reasonable certainty is that 2 + 0.4^2 equals 2+0.16= 2.16. Please clarify the first part of your expression, so that I can understand what you're trying to do here.
40% of 270 is 108 because first you divide 40/100and you get 0.4 then you multiply that by 270 and you get 108
