Q7 of 29 Page 8

If 3 x = sec θ and find the value of . [CBSE 2010]

We have, 3 x = sec θ


∴ …(1)


Also we have


∴ …(2)


Squaring (1) and (2) we get..



Subtract we get






More from this chapter

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5

If tan 2A = cot (A – 18°), where 2A is an acute angle, find the value of A[CBSE 2009]

 6

Prove that:

2/3 cosec2 58°-2/3 cot 58° tan 32° -5/3 tan 13° tan 37° tan 45° tan 53° tan 77° = —1.[CBSE 2009]

 8

cot θ tan (90° -θ) - sec (90° - θ)cosec θ +√3tan 12°tan 60°tan 78° = 2[CBSE 2010]

 9

Prove each of the following identities:

[CBSE 2001]