20-08-2019
Mathematics

contestada

Evaluate sin^2(pi/4)-cos^2(pi/4) and simplify whenever possible.

Respuesta :

LammettHash LammettHash

20-08-2019

By the double angle identity for cosine,

[tex]\sin^2\dfrac\pi4-\cos^2\dfrac\pi4=-\cos\dfrac\pi2=0[/tex]

Answer Link

ACCESS MORE ACCESS MORE ACCESS MORE ACCESS MORE

Otras preguntas

Solve -7x^2+14x+21=0

How are health screenings different homexaminations? (Select all that apply.)Health screenings check for specificdiseases, whereas examinations can bespecific o

When it was founded, the primary goal of Al-Qaeda was to do what? A. Remove all western ideas from nations who were Muslim B. To form a lasting peace with the U

Write the complete ionic equations, spectator ions and net ionic equation for the following. 1. ZnBr2(aq)+___AgNO3(aq) 2. HgCl2(aq)+Kl(aq) 3.Ca(OH)2(aq)+Na2S

Consider the arithmetic sequence 13, 16, 19, 22, 25, ... Write the sequence in another way.

A plane takes off at an angle of elevation of 15 degrees

3x^3+21x^2+6x+42 a- (7x+1)(3x+6) b-(3x+7)(x+1) c-(x+7)(3x^2+6) d-(7x^2+1)(x+6)

Consider the arithmetic sequence 13, 16, 19, 22, 25, ... What is the 60th term in the sequence?

A new cream that advertises that it can reduce wrinkles and improve skin was subject to a recent study. A sample of 50 women over the age of 50 used the new cre

Neither of the boys made it on the baseball team of _______ choice. Which pronoun correctly completes the sentence? A) its B) them C) his D) their