In Triangle PQR Right Angled at Q. PQ = 3 cm and PR = 6 cm. Determine Angle QPR and Angle PRQ


Q: In Δ PQR, right-angled at Q (see Fig. 8.20), PQ = 3 cm and PR = 6 cm. Determine ∠ QPR and ∠ PRQ.


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.If sin A-B =1/2, cos A+B =1/2 THEN FIND THE VALUE OF A and B



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evaluate sin 60 degree cos 30 degree + sin 30 degree cos 60 degree


Q: Evaluate the following sin 60° cos 30° + sin 30° cos 60°


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Evaluate Cos 45/Sec30+Cosec30 | Evaluate Cos 45 Degrees by Sec30 Degree + Cosec 30 Degree

Q: Evaluate cos 45° /sec 30° + cosec 30°


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Evaluate 5cos260°+4 sec230°− tan245° sin230°+ cos230°


Q: Evaluate 5cos^260°+4 sec^230°− tan^245° sin^230°+ cos^230°


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Express the trigonometric ratios sin A, sec A and tan A in terms of cot A.


Hint 💡
sin A= 1/Cosec A
tan A = 1/Cot A
sec^2 A = 1 + – tan^2 A
cosec^2 A = 1 + cot^2 A


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Exercise 8.2 class 10
Choose the correct option and justify your choice
i) (2 tan⁡ 30°)/(1+tan^2 30)
a) sin 60°
b) cos 60°
c) tan 60°
d) sin 30°

ii) (1-tan^2 45°)/( 1+tan^2…

MCQ of Trigonometry class 10 | mcq of maths ch 8 class 10 | class 10 maths chapter 8 live

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Write all the other Trigonometric Ratios of Angle A in terms of Sec A


Q: Write all the other trigonometric ratios of ∠ A in terms of sec A.


Hint 💡
cosec A = 1/sin A
tan A = 1/Cot A
cos A = 1/ sec A
tan^2 A = sec^2 A - 1
tan A = sin A/cos A


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1+tan2A/1+cot2A=tan2A | 1+tan square A/1+cot square A | 1+tan2A/1+cot2A

Q: Choose the correct option. Justify your choice.
(1+tan^2⁡𝐴)/(1+cot^2⁡𝐴 )
(A) sec^2⁡𝐴
(B) –1
(C) cot^2⁡𝐴
(D) tan^2⁡𝐴





Hint 💡
1+tan^2 A = sec^2 A
1+cot^2 A = Cosec^2 A
tan A…

(Cosec Theta-Cot Theta)2=1-Cos Theta/1+Cos Theta | (Cosec-Cot)2=1-Cos/1+Cos

Q: Prove the following identities (𝑐𝑜𝑠𝑒𝑐 θ − cotθ )^2= (1−cos⁡θ )/(1+cos⁡θ)




Hint 💡
cot A = cos A/sin A
cosec A=1/sin A
(a+b)(a-b)=a^2-b^2
sin^2 A = 1-Cos^2 A


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Q: Prove the following identities: cos⁡𝐴/(1+sin⁡𝐴 )+(1+𝑠𝑖𝑛𝐴)/cos⁡𝐴 =2 sec⁡𝐴



Hint 💡
(a+b)^2=a^2+b^2+2ab
Cos^2 A + sin^2 A = 1
1/cos A= sec A


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Tan Theta /1-Cot Theta + Cot Theta /1-Tan Theta =1+Sec Theta Cosec Theta

Q: Prove the following identities: tan⁡θ/(1−cot⁡θ)+cot⁡θ/(1−tan⁡θ)=1+𝑠𝑒𝑐θcosecθ


Hint 💡
cot A = cos A/sin A
cosec A=1/sin A
(a+b)(a-b)=a^2-b^2
sin^2 A = 1-Cos^2 A


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1+SecA/SecA= Sin2A /1-CosA | Prove the following identities (1+s𝑒𝑐⁡𝐴)/s𝑒𝑐⁡𝐴 =sin^2⁡𝐴/(1−𝑐𝑜𝑠𝐴)

Q: Prove the following identities: (1+s𝑒𝑐⁡𝐴)/s𝑒𝑐⁡𝐴 =sin^2⁡𝐴/(1−𝑐𝑜𝑠𝐴)


Hint 💡
sec A=1/COS A
(a+b)(a-b)=a^2-b^2
sin^2 A = 1-Cos^2…

assertion reason questions chemistry class 10 chapter 2 | assertion reasoning questions chemistry

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previous year questions class 10 maths | probability class 10 previous year questions

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MCQ Of Real Numbers Class 10 | class 10 maths ch 1 mcq term 1 | Most Important Class 10 Maths MCQ


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MCQ of Ch 2 Class 10 | mcq of Acid, bases and salts class 10 | science MCQ Class 10

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Class 10 Term 1 MCQ SST | The Rise of Nationalism in Europe class 10 MCQ Online Test


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Class 10 Term 1 MCQ SST | The Rise of Nationalism in Europe class 10 MCQ Online Test


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