要计算 sin270∘\sin 270^\circsin270∘,我们可以利用三角函数的周期性和对称性来简化计算。 周期性和对称性: 正弦函数 sinθ\sin \thetasinθ 的周期为 360∘360^\circ360∘,这意味着 sin(θ+360∘n)=sinθ\sin (\theta + 360^\circ n) = \sin \thetasin(θ+360∘n)=...
sec ( theta -270^(@) ) का मान ज्ञात कीजिए| 02:34 सिद्ध करें की sin (270^@ +A)=-cos A 03:19 सिद्ध कीजिए की: cos ( 270^(@) -A) =-sin A 01:45 सिद्ध ...
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[ \sin\theta = \frac{\text{对边}}{\text{斜边}} ] 二、特殊角的正弦值 常见角度的正弦值可直接记忆: ( \sin0°=0 ) ( \sin30°=\frac{1}{2} ) ( \sin45°=\frac{\sqrt{2}}{2} ) ( \sin60°=\frac{\sqrt{3}}{2} ) ( \sin90°=1 ) ( \sin180°=0 ...
At the point (0,-1) we can say \sin(270)=-1 as the angle \theta is 270^o . Continuing the point around the unit circle back to the coordinate (1,0) , we get \sin(360)=0 as \theta has made a full turn back to the positive x axis. \sin(\theta) is as periodic function...
(sin ( (-θ -(90)^(° )) )) ((cos)^2 ( ((270)^(° )-θ ) ))- 1 (cosθ )=$\dfrac {sin\left [ {-\left ( {9{0}^{\circ }+\theta } \right )} \right ]} {co{s}^{2}_{\, }\left [ {18{0}^{\circ }+\left ( {9{0}^{\circ }-\theta } \right...
sin(−90)=−1 Explanation: sin−90=sin(360−90)=sin270 Angle 270∘ is third ... sin(510) https://www.tiger-algebra.com/drill/sin(510)/ Calculate the value of the sin of 510 ° To enter an angle in radians, enter sin(510RAD) sin(510 °) = 0.5 Sine, in mathematics,...
- **A. -100**:需满足 \( \sin(\theta) = -1 \),此时相位角为 \( 270^\circ \),但题目中相位角为 \( 30^\circ \),错误。 - **B. 50**:计算与推导结果一致,正确。 - **C. -50**:需相位角为 \( 210^\circ \) 或类似导致 \( \sin(\theta) = -0.5 \),不符合题意。 -...
For example, {eq}\sin ^{2} \theta + \cos^{2} \theta = 1, 1+ \tan^2 \theta = sec^{2} \theta, {/eq} etc. Here, {eq}\sin {/eq}, {eq}\cos {/eq}, {eq}\sec {/eq}, and {eq}\tan {/eq} are the trigonometric ratios....
Step by step video & image solution for Let (sin(180^@+theta)cos(270^@-theta)cot(theta -360^@))/(cos(theta-90^@) sin (360^@-theta)tan(270^@+theta))=sqrt(a) (sin^(90^@-theta)+sin^2(90^@+theta)-1)/(1-cos^2(270^@-theta)-cos^2(270^@+theta))=b^2 then determine ...