plz i can not type pi alpha sign , idk how to type , i know it is equil to sina but i need to know why it is equil to sina ? i need to know

plz i can not type pi alpha sign , idk how to type , i know it is equil to sina but i need to know why it is equil to sina ? i need to know

Question based on trignometric ratios.

second dervative of Asin(mx)+Bcos(nx)

The length of one side of the right triangle is 10cm. What might the lengths of the other sides be? Provide 5 solutions

Two holes are to be drilled 42 and 3/4 inches apart. If they are spaced 20 and 1/2 inches apart horizontally and 37 and 1/2 vertically use trigonometry to find angle a round to one decimal place...

Given that tan a =k and 0<a<π/2 find a) tan(π+a) b) tan(π/2 + a) c) tan(-a)

Instead of walking along two sides of a rectangular field, Fran took a shortcut along the diagonal, thus saving distance equal to half the length of the longer side. Find the length of the...

How many times did the wheel rotat? How many radians did it turn? ps. I need to know how to get the answer, thx!

Determine the acute angle at which y=2x-1 and y=0.5x+2 intersect. Can you please include the process of how to solve the problem? Thank you.

In △ABC, BD is perpendicular to AC. a) Show that the two smaller triangles inside △ABC are similar to each other. b) If BD = x and AD = y, find the ratios of the areas...

A belt 24.75 meters long passes around a 3.5 cm diameter pulley.As the belt makes three complete revolutions in a minute,how many radian does the wheel turn in 2.5 seconds?

tanθ = [2x(x+1)]/(2x+1) find Sinθ and Cosθ

equivalent trig expressions

thank you

find cos (a+b) if sin (a) = -3/5 where a is in the fourth quardrant and tan (b) =12/5 where b is in the third quardrant

of tanA=CotA, then find CosA+SinA

Round to the nearest three decimal places. I'm not sure if i should take the derivative and then solve for 0. Using critical values. I'm very confused and my notes are no help.

A particle is moving on the perimeter of a circle with radius r=20 with angular speed of π9 radians per second. After completing 4 full rotations, the particle traveled for 5 more seconds and stopped...

The answer is 48.5°

I tried solving it using a graphing calculator and by using a triangle with SohCahToa, and I believe the answer is 2/(45^(1/2)) but am told it's wrong. Please help?