Can someone explain to my why sin(90)=1
1 answer:
On the unit circle: the end of the terminal side of a 90 degree angle is (1,0) where 1 is the value of sin(90°) and 0 is the value of cos(90°)
On the graph of sine: 90° =
radians. if f(x) = sin(x) in radians, f(
) = 1/2
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Answer:
<h3>#7</h3>
(a)
<u>Sample space:</u>
1*1, 1*2, 1*3, 1*4, 2*1, 2*2, 2*3, 2*4, 3*1, 3*2, 3*3, 3*4, 4*1, 4*2, 4*3, 4*4 Total 16 outcomes
(b)
(i) P(even) = 12/16 = 3/4 (ii) P(3x) = 7/16 (iii) P(perfect square) = 4/16 = 1/4 <h3>#8</h3>
(a) <u>Sample space:</u>
1T, 1H, 2T, 2H, 3T, 3H, 4T, 4H Total 8 outcomes
(b)
(i) 1T, 3T
(ii) 1H, 4H
P(H and square) = 2/8 = 1/4 (iii) 1H, 2H, 3H, 4H
The square root of 80 can be broken up into the square root of 16 x square root of 5. We know that the square root of 16 is 4. So in the form (a sqrt b)
A would be 4 and b would be 5.
Answer: 4 sqrt 5
Answer:
41.13 sq m
Step-by-step explanation:
area of square = 4² = 16
there are two quarter-circles which equals one semicircle
area of semi-circle is πr²/2
A = 4²π/2 = 8π = 25.13
add together: 16 + 25.13 = 41.13
