2015年9月19日 · The expression evaluates to ' 1 '. Using the formula for sine of difference of two angles that is, sin (A-B) = (sin A cos B - cos A sin B), the expression can very easily be evaluated. In your problem A=110° and B=20°. therefore sin(A-B) = sin(110°-20°)= sin (90°)=1 But if you insist on using the cosine sum or difference identity, …

2018年5月21日 · 24. Here, "the Nr."=96sin65^@sin35^@sin80^@, =48{2sin65^@sin35^@}sin80^@, =48{cos(65^@-35^@)-cos(65^@+35^@)}sin80^@, =48{cos30^@-cos100^@}sin80^@, =48{sqrt3/2-cos(180 ...

2016年8月20日 · x=(43sin(29))/sin110 x~~22.185 to 3 decimal places Turn upside down: x/sin(29)=43/sin(110) Cross multiply: x=(43sin(29))/sin110 x~~22.185 to 3 decimal places

2017年3月16日 · How do you use use quotient identities to explain why the tangent and cotangent function have

2015年9月7日 · By the Law of Sines, we know that: sin a/x = sin110/34 = sinc/25 We can immediately solve for c. sin110/34 = sinc/25 (25sin110)/34=sinc c=sin^-1((25sin110)/34) The sum of angles in a triangle is 180, so we can solve for a: 180 = a + 110 + sin^-1((25sin110)/34) a = 70 - sin^-1((25sin110)/34) We now just need to solve the following equation for x ...

2018年2月2日 · Area of a Triangle where one angle (C)and the two sides (a and b) enclosing that angle is given by A = (1/2)*a*b*sinC So , here the Area is A = (1/2)*6*10*sin110° rArr A = 30*(0.94) rArr A = 28.2 square unit

2017年5月15日 · 344 views around the world You can reuse this answer ...

2015年11月8日 · First convert the angle to standard form Add multiples of 2pi to find the standard angle between [0, 2pi]. Here we want to add 4pi to -3pi to get sin(pi) sin(pi)=0 hope that

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2018年3月15日 · You are very close, see below... 16(sin x) = (sin 110°)9 Divide by 16 on both sides: (sin x) = ((sin 110°)9)/16 Inverse trigonometry: x = arcsin(((sin 110°)9)/16 ...