2017年11月17日 · tan(45^@)=1 sin(45^@)=sqrt2/2 cos(45^@)=sqrt2/2 45^@ is a special angle, along with 30^@, 60^@, 90^@, 180^@, 270^@, 360^@. tan(45^@)=1 sin(45^@)=sqrt2/2 cos(45 ...

2018年3月31日 · Use the #sin# angle addition formula:. #sin(color(red)A+color(blue)B)=sincolor(red)Acoscolor(blue)B+coscolor(red)Asincolor(blue)B#

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 ...

2015年8月14日 · sin (60^@ + 45^@) = (sqrt(3) + 1)/(2sqrt(2)) Using the sine identity: sin (A +- B) = sin A cos B +- cos A sin B sin (60^@ + 45^@) = sin 60^@ cos 45^@ + cos 60^@ sin ...

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^@#

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 = 1 sec 225 = 1/cos 225 = -sqrt2 csc 225 = 1/sin 225 = - sqrt2

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 geometrical way: since the sine of an angle is the y-coordinate of the point of the unit circle related to that angle, you can clearly see that angles from 0° to 180° have a non-negative sine value, while …

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 ...