If sin 20 26
where 0 e (45":360"] determine, with the aid of a diagram and
5
without using a calculator the value of sin 0.
(6)
4.2
Simplify without using a calculator:
sin 1040 (2 cos 15" - 1)
lan 38". sin 4120
(6)
4.3
Prove the identity:
1
cos 2.1 + 1
COS 2.1.cosur
(5)
1
cos
2
Determine the solution of:
shr + cos. x = 1, for 0° <!< 360°​

an altitude of 15,000 feet

step-by-step explanation:

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for

the rocket cannot penetrate the ground, in a contextual sense, therefore the roots of this equation should be the domain of this function. i'll let you find the roots of this quadratic equation (hint: use the quadratic formula:  

1- c

2-a

step-by-step explanation:

mark brainliest!