SOLUTION: Please help me! Thank you so much! Write the expression as the sine, cosine, or tangent of an angle: sin 49� cos 11�

SOLUTION: Please help me! Thank you so much! Write the expression as the sine, cosine, or tangent of an angle: sin 49� cos 11� - cos 49� sin 11�

Question 869639: Please help me! Thank you so much! Write the expression as the sine, cosine, or tangent of an angle: sin 49� cos 11� - cos 49� sin 11�
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
I would use the trigonometric identity

and the fact that .

NOTE:
Someone may say to use
,
but that means one more formula.
I do not believe in memorizing, so I just rediscover the formulas with a + sign each time I need one of them.
RELATED QUESTIONS
Hello! I need help solving this: Write the expression as the sine, cosine, or... (answered by ikleyn)

Write the expression as the sine, cosine, or tangent of an angle. cos 94� cos 37� +... (answered by Century)

Write the expression as the sine, cosine, or tangent of an angle. sin 5x cos x - cos... (answered by tommyt3rd)

Write the expression as the sine, cosine, or tangent of an angle. cos 112� cos 45� +... (answered by ikleyn,MathTherapy)

Write the expression as the sine, cosine, and tangent of an angle: Sin 330 cos 45 -... (answered by lwsshak3)

Write the expression as the sine or cosine of an angle. cos 5x cos 7x-sin 5x sin... (answered by MathLover1,ikleyn)

Write the expression as either the sine, cosine, or tangent of a single angle. sin (... (answered by josgarithmetic)

write the expression as sine, cosine or tangent of a single angle. cos(pi )/(6)cos(pi... (answered by ikleyn)

Write the expression as either the sine, cosine, or tangent of a single angle. sin (... (answered by josgarithmetic)