lesleal31 lesleal31

04-05-2017
Mathematics

contestada

Rewrite cos2 67.5° – sin2 67.5° using a double-angle identity.
cos 135°

sin 135°

cos 33.75°

sin 33.75°

Respuesta :

zebsi0n zebsi0n

04-05-2017

The Double Angle identity for cos is as follows:
[tex]cos(2a)=cos^2(a)-sin^2(a)[/tex]
Because this is the same form as the equation you asked for, just double 67.5 to get cos(135).

Answer Link

Otras preguntas

Your grandmother tells you a dollar doesn’t go as far as it used to. She says the “purchasing power” of a dollar is much less than it used to be. Explain what s

We call a number special if every digit in the number either is a 1 or borders a 1. For example, 11111, 13, 141, 1441, 515151, and 101 are all special, but 100

what is the function of a linking verb

What led to Europe's age of exploration? Be specific and explain in detail.

PLEASE READ and ANSWER! How do I multiply 0.79 x 3.7 step by step? Pls Answer!!

Our narrator is scout, a girl who will grow from age 6 to almost 9 during the story. what do you suppose we, as the readers, should be aware of as we listen to

5. What is one of the memories Hester has during her three-hour ordeal on the scaffold in Chapter 1 of The Scarlet Letter? A. She reflects on her chi

We call a number special if every digit in the number either is a 1 or borders a 1. For example, 11111, 13, 141, 1441, 515151, and 101 are all special, but 100

Which answer identifies the participial phrase and the word it modifies in this sentence? The candle flickering on the table provides the only light in the roo

What is the estimate 323 +151