SOLUTION: Use the sum angle formula to simplify cos(x + 270○)
Algebra.Com
Question 431468: Use the sum angle formula to simplify cos(x + 270○)
Answer by Gogonati(855) (Show Source): You can put this solution on YOUR website!
Solution:We write:cos(270+x)=cos[180+(90+x)]=-cos(90+x)=sinx.
RELATED QUESTIONS
Use trigonometrical identities to expand and simplify if possible, the following:
1) cos (answered by swincher4391)
Use the trigonometric identities to expand and simplify if possible.
For... (answered by MathLover1)
Use the functions f(x) = 2x +7, g(x) = x squared + 3x, and h(x) = 1/x-7 to find each of... (answered by funmath)
Use f(x) = 4x − 2 and g(x) = 5 − x^2 to evaluate the expression.
(a) (f... (answered by stanbon)
Use the addition and subtraction formula to simplify... (answered by Nate)
Use the Angle sum identity to verify:
sin(x+(pi/2))=cos... (answered by ikleyn)
Use the Angle sum identity to verify:
Question #1.
sin(x+(pi/2))=cos... (answered by ikleyn)
Derive the half angle formula for sin( u/2 ) by following the steps below.
(a) Use the... (answered by richard1234)
Use a sum or difference formula to write a formula for cos2x. Express the result... (answered by ikleyn)