We will use double angle identities:
cos (5x ) = sin (10x )
cos (5x ) = 2 cos (5x ) sin ( 5x )
cos ( 5 x) - 2 cos ( 5 x ) sin ( 5x ) = 0
cos ( 5 x ) · [ 1 - 2 sin (5 x) ] = 0
cos ( 5 x ) = 0 or : 1 - 2 sin (5 x) = 0
5 x = π/2 +kπ, k∈Z sin (5 x) = 1/2
x1 = π/10 + kπ/5 5 x = π/6+2kπ , k∈ Z
5 x = 5π/6 +2kπ , k∈ Z
x 2 = π/30 +2kπ/5
x 3 = π/9 + 2kπ/5
Answer:
5 exponent 2 = 25 5 exponent 8 equals 390625
Step-by-step explanation:
A D
Answer:
Isosceles and scalene
Step-by-step explanation:
Isosceles triangle means two angles must be equal and one angle 90 degrees. It is called isosceles right triangle.
We know that one angle is 90 degrees
90 -45-45 degrees
This could be scalene triangle, the other two angles must add upto 90 degrees
It could be 30 and 60 or any other combination.
90-60-30
The answer is Isosceles and scalene
Hope this will helpful.
Thank you.
if f(-1) is evaluated then the answer is (-1,-4)
The angle between the two tangents drawn from an external point to a circle and the angle subtended by the line segment joining the points of the contact at the Centre are supplymentary,
So,
15.) let the unknown angle be x
=》x + 55° = 180°
=》x = 180° - 55°
=》
16. let the unknown angle be n
=》n + 80° = 180°
=》n = 180° - 80°
=》