TRIGONOMETRY TOP 11

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BRILLIANT COACHING

MATHEMATICS (Class-10)

Chapter : Trigonometry

(Questions 1 marks)

Q1. If θ= 45o. Find the value of sec2θ

Q2. Evaluate: cos60ocos45o-sin60osin45o.

Q3. Find the value of tan15o.tan25o.tan30otan65o.tan85o.

Q4. If θ is a positive acute angle such that sec θ = cosec60o, then find the value of 2cos2 θ -1.

Q5. Find the value of sin65o-cos25o without using tables.

Q6. If sec5A=cosec(A-36o). Find the value of A.

Q7. Find the value of 9sec2A-9tan2A.

(Questions 2/3 marks)

Q1. Prove that sin6θ+cos6θ=1-3sin2θcos2θ.

Q2. From the figure find the value of sin x and cos y.

Q3. If 5tanA-4=θ, then find the value of 5sinA-cosA/5sinA+4cosA
Q4. In ABC,



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