Find cos if sin = 1/2 terminates in QII

Q: evaluate exactly cos-1(-3/2)

A: -3/2 lies outside the domain of the function. Hence we will have no solution

Q: Verify the identity: cos2 x - sin2 x = 2 cos2 x - 1

A:

Q: Find exact positive value of Cos ꆪ = 2/3

A:

Q: : Find Sin 1(2-2i)

A:

Q: cos49-sin*0 2. = 1– tan20 cos²0

A:

Q: Compute the exact value of sin() (7. 8

A: To find:sin7π8

Q: Verify the identity sec-1 x = cos-1(1/x), for x ≠ 0.

A: According to the question, we have to verify the identity sec-1x=cos-11x. As the above function is…

Q: Find the exact value of sin195o

A: Find the exact value:

Q: Show that os (2 tan~ r) COs

A: We have to prove that cos(2tan-1x)=1-x21+x2.

Q: Find the value of cos 1- + 2 sin 1/2

A: value=?

Q: Prove that cos 20/sin20=2cos20 |

A:

Q: 2 sin- If p = cos -1 q, show that 4p? – 4pt + q? = 1.

A:

Q: Verify the identity: [sin 2x + (sin 3x + sin x)]/[cos 2x + (cos 3x + cos x)] = tan 2x

A: Consider the identity, sin2x+sin3x+sinxcos2x+cos3x+cosx=tan2x To apply the trigonometric identity,…

Q: If cos u = - 2/3and u terminates in QIII, find sin u.

A: Given: cosu=-23, u terminates in 3rd quadrant We know that if u is in 3rd quadrant then sinu and…

Angles

In mathematics, angles constitute a very important part. Just like the concept of lines, an angle is a necessary figure that is used for measurement. How do you define its formation? It is formed when two or more lines meet at a point. The point at which two or more lines meet is known as the vertex. When the lines get inclined at this point, they do form various angles. Angles are measured from the vertex in terms of degrees.