using the power reducing formula, Write cos^4 ? in terms of first powers of cosine.

Q: Find sin 5pai/6.

A:

Q: sin120o = ..............,cos240 o =...................

A:

Q: why

A:

Q: From the list below find the expression equivalent to sin9x

A: see 2nd step

Q: simplify sin(180degrees-x)   A.cosx B.sinx C.-sinx D.-cosx

A:

Q: 1 For cos2(xy) = , evaluate y' when x = 1.

A: The given equation is cos2xy=14. Calculate the first differentiation y' of the given equation at…

Q: solve x by using the law of cosine

A: We have been given the measurements of the right-angled triangle and the measurement of an angle and…

Q: simplify sin3x + cos2xsinx

A:

Q: A skier skied on a circular trail, starting at the position (2.5, 0) on the circle and ended at the…

A:

Q: Find if sin x +1= cos y

A: Given,           sinx+1=cosy

Q: cos(920)

A: use trigonometric identity

Q: Verify the identity. 1 + Csc X cot x cot x 2 sec x 1 + csc X

A:

Q: Evaluate 3 L, cos¹ (2+1) dr. -1

A: l have given the answer in the next step. Hope you understand that

Q: Perform the Multiplication (sinx+cosx)^2

A: We can just perform the multiplication and trignometrical property.

Fundamentals of Trigonometric Identities

Trigonometric Identities are the equalities that involve trigonometry functions and hold for all the values of variables given in the equation.