Answer:
4
Step-by-step explanation:
Answer:
1
Step-by-step explanation:
Using the trigonometric identities
tan(90 - x) = cotx , cotx = 
Given
tan1tan2tan3....................... tan87tan88tan89
= tan1tan2tan3............... tan(90-3)tan(90-2)(tan90 - 1)
= tan1tan2tan3.............. cot3cot2cot1
= tan1cot1tan2cot2tan3cot3 ........................
= 1 × 1 × 1 ×....................... × 1
= 1
Answer:
C
Step-by-step explanation:
Just re-draw the triangle reflecting the y-axis
Answer:
94.18
Step-by-step explanation:
Given in the question a semi circle and a right angle triangle
Step 1
Find the diameter of the semi circle
To find the diameter we will use pythagorus theorem
<h3>hypotenuse² = height² + base²</h3>
here,
hypotenuse will be diameter of semicircle
height = 9
base = 4
Plug values in the formula above
diameter = √(9²+4²)
diameter = √97
Step 2
Find radius
<h3>radius = diameter / 2</h3>
Step 3
Area
<h3>π(r)²</h3>
π(√97/2)²
= 76.18
Step 4
Total surface area = area of circle + area of right angle triangle
= 76.18 + 1/2(9)(4)
= 94.18
Complementary events are the events which are opposite of the given event.
For example, for a "rainy day", its complimentary event is "not a rainy day".
We can also say, If A is a given event, then " not A" is its complimentary event.
In the given question we have been given the event of choosing a girl's name when drawing names from a cup in class.
Now in class as there can be boys or girls, the complimentary even of choosing a girl's name is choosing a boy's name.
Option C) is the right answer.
