How do you find the exact value of #sin(135^circ)-cos(30^circ)#?

Related questions

• What are some sum and difference identities examples?
• How do you use the sum and difference identities to find the exact value of #cos 15^@#?
• How do you use the sum and difference identities to find the exact value of cos 75?
• How do you use the sum and difference identities to find the exact value of tan 105 degrees?
• How do you apply the sum and difference formula to solve trigonometric equations?
• How do you evaluate #sin(45)cos(15)+cos(45)sin(15)#?
• How do you write #cos75cos35+sin75sin 35# as a single trigonometric function?
• How do you prove that #cos(x-y) = cosxcosy + sinxsiny#?
• How do you evaluate #cos((3pi)/5)cos((4pi)/15)+sin((3pi)/5)sin((4pi)/15)#?
• If sinA=4/5 and cosB= -5/13, where A belongs to QI and B belongs to QIII, then find sin(A+B)....