Simplify the expression sin 2x+ sin x + cos2x - 1.
1 answer:
You might be interested in
Answer:
The three questions about the given triangle has been answered below.
Step-by-step explanation:
We are given a right angled triangle whose sides are of length 20, 21 and 29.
<u>(1)</u> sin(B) =
=
= 0.72
<u>(2)</u> sin(A) =
sin(A) = 0.689
∠CAB =
∠CAB = 43.551°
<u>(3)</u> We suppose that cosA < sinA and we haveto find which all angles will satisfy this condition.For this the angle A should be greater than 45°.
From the given options the angles that satisfy this are 55 , 66 and 75.
45 is not included as then sinA = cosA and that condition is not there.