2015年7月31日 · sin(45^o)=sqrt(2)/2~~0.7071... An angle of 45^o is an angle in the right triangle with equal catheti because another acute angel must be 45^o as well..

What is the sin cos and tan of 45? Trigonometry Right Triangles Trigonometric Functions of Any Angle. 1 ...

2018年3月12日 · #sin(alpha+beta) = sin alpha cos beta + cos alpha sin beta# and assuming the angles are expressed in degrees: #sin(45°+30°) = sin 45° cos 30° + cos 45°sin 30°#

2015年8月23日 · Find 6 trig functions of 225 deg sin 225 = sin (45 + 180) = - sin 45 = -sqrt2/2 cos 225 = cos (45 + 180) = - cos 45 = -sqrt2/2 tan 225 = sin 225/cos 225 = 1 cot 225 = 1/tan 225 = …

2018年4月6日 · Given: #cos 45^@# From the trigonometry cofunction identities: #cos theta = sin (90^@ - theta)# Let #theta = 45^@: " " cos 45^@ = sin (90^@ - 45^@) = sin 45^@#

2015年9月26日 · The answer is 1.20 sin45^"o"=0.71 cos60^"o"=0.50 0.71+0.50=1.20. How do you use the ordered pairs on a unit circle to evaluate a trigonometric function of any angle?

2018年3月20日 · :. sin 45 cos 15 + cos 45 sin 15 = sin (45 + 15) = sin 60 = sqrt 3/2 sin 45 cos 15 + cos 45 sin 15 It is in the form sin a cos b + cos a sin b But we know sin (a + b ...

2015年9月25日 · It's negative. First of all, the sine function is defined all over the real set, so there's no chanche that \\sin(-45°) is undefined. Now, you can solve the problem in a …

2015年9月29日 · 12*sqrt(2) sin 45=1/sqrt(2) 1/sqrt(2)=12/x x=12*sqrt(2)

2015年7月19日 · Find 3 trig functions of arc 225 deg Answers: sin = cos = -(sqrt22)/2 , tan = 1 On the trig unit circle, the arc 225 is in Quadrant III. sin 225 = sin (45 + 180) = - sin 45 = -(sqrt2)/2 …