If Δ A B C \Delta ABC Δ A B C is right angled at C, then find the value of cos (A+B)

3 2 \frac{\sqrt{3}}{2} 2 3 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

Value of cos ⁡ 45 ° \cos45\degree cos 4 5 ° is

1 2 \frac{1}{\sqrt{2}} 2 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> 1

3 2 \frac{\sqrt{3}}{2} 2 3 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

Introduction to Trigonometry

Authored by Makanadar Habeebpasha

Mathematics

9th - 12th Grade

CCSS covered

Used 1K+ times

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15 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

$2\sin^245\degree$ =......

$\frac{1}{2}$

$\frac{1}{\sqrt{2}}$

None of the above

Tags

CCSS.HSF.TF.C.8

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Is tanA the reciprocal of cotA

YES

Tags

CCSS.HSG.SRT.C.7

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The value of $\cos90\degree$ is 1

TRUE

FALSE

Tags

CCSS.HSF.TF.A.2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

$\cot\ \left(90\degree-A\right)=$

sec A

sin A

tan A

cos A

Tags

CCSS.HSG.SRT.C.7

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If $\Delta ABC$ is right angled at C, then find the value of cos (A+B)

$\frac{1}{2}$

$\frac{\sqrt{3}}{2}$

Tags

CCSS.HSG.SRT.C.7

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a right angled triangle the side opposite to right angle is called

Base

Perpendicular

Hypotenuse

None of the above

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

$\sin^229\degree+\sin^261\degree=$

$2\sin^229\degree$

$2\cos^261\degree$

Tags

CCSS.HSF.TF.C.9

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

$\sin\theta=\frac{4}{3}\$ for some angle of $\theta$ . State true or false

TRUE

FALSE

Tags

CCSS.HSF.TF.B.7

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

$\sec^260\degree-1=$

Tags

CCSS.HSF.TF.C.8

10.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Write the maximum value of $\sin\theta$

-1

Tags

CCSS.HSF.TF.A.4

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Introduction to Trigonometry

2sin⁡245°2\sin^245\degree2sin245° =......

Is tanA the reciprocal of cotA

The value of cos⁡90°\cos90\degreecos90° is 1

cot⁡ (90°−A)=\cot\ \left(90\degree-A\right)=cot (90°−A)=

If ΔABC\Delta ABCΔABC is right angled at C, then find the value of cos (A+B)

In a right angled triangle the side opposite to right angle is called

sin⁡229°+sin⁡261°=\sin^229\degree+\sin^261\degree=sin229°+sin261°=

sin⁡θ=43 \sin\theta=\frac{4}{3}\ sinθ=34​ for some angle of θ\thetaθ . State true or false

sec⁡260°−1=\sec^260\degree-1=sec260°−1=

Write the maximum value of sin⁡θ\sin\thetasinθ

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Discover more resources for Mathematics

$2\sin^245\degree$ =......

The value of $\cos90\degree$ is 1

$\cot\ \left(90\degree-A\right)=$

If $\Delta ABC$ is right angled at C, then find the value of cos (A+B)

$\sin^229\degree+\sin^261\degree=$

$\sin\theta=\frac{4}{3}\$ for some angle of $\theta$ . State true or false

$\sec^260\degree-1=$

Write the maximum value of $\sin\theta$